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Member "less-562/NEWS" (19 May 2020, 32965 Bytes) of package /linux/misc/less-562.tar.gz:


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    1 
    2                      NEWS about less
    3 
    4 ======================================================================
    5 
    6   For the latest news about less, see the "less" Web page:
    7       http://www.greenwoodsoftware.com/less
    8   You can also download the latest version of less from there.
    9 
   10   To report bugs, suggestions or comments, send email to bug-less@gnu.org
   11 
   12 ======================================================================
   13 
   14 	Major changes between "less" versions 551 and 562
   15 
   16 * Update Unicode tables.
   17 
   18 * Treat Hangul Jamo medial vowels and final consonants as zero width.
   19 
   20 * Display error message immediately when -o is toggled and 
   21   input is not a pipe.
   22 
   23 * Fix regression: make screen repaint when "squished" and 
   24   a no-movement command is given.
   25 
   26 * Fix erroneous EOF calculation when F command is interrupted.
   27 
   28 * Make WIN32C version include this fix from 551:
   29   Don't count lines in initial screen if using -X with -F.
   30 
   31 * Fix display bug in WIN32C version.
   32 
   33 * Fix memory corruption when built with libtermcap.
   34 
   35 * Support libtinfow.
   36 
   37 ======================================================================
   38 
   39 	Major changes between "less" versions 530 and 551
   40 
   41 * Add --mouse option.
   42 
   43 * Add --wheel-lines option.
   44 
   45 * Add --no-histdups option.
   46 
   47 * Add --save-marks option.
   48 
   49 * Support PCRE2 regular expression library.
   50 
   51 * Redraw screen on SIGWINCH even if screen size doesn't change.
   52 
   53 * Shell-escape filenames in history so they can be used again.
   54 
   55 * Ring bell if user enters invalid long option name.
   56 
   57 * Use PCRE_UTF8 flag for pcre regular expressions when in UTF-8 mode.
   58 
   59 * Windows: use wide-char string to set console title.
   60 
   61 * Don't count lines in initial screen if using -X with -F.
   62 
   63 * Support mingw build system.
   64 
   65 * Fix bug in v command on empty file.
   66 
   67 * Fix bug in v command when filename contains shell metacharacters.
   68 
   69 ======================================================================
   70 
   71 	Major changes between "less" versions 487 and 530
   72 
   73 * Don't output terminal init sequence if using -F and file fits on one screen.
   74 
   75 * When using -S, mark truncated lines with a special character.
   76   The character can be changed or disabled via the new --rscroll option.
   77 
   78 * New command M marks the last line displayed on the screen.
   79 
   80 * New command ESC-m removes a line mark.
   81 
   82 * Status column (enabled via -J) now shows mark letters.
   83 
   84 * Status column shows search matches even if highlighting is disabled via -G.
   85 
   86 * A second ESC-u command will clear search match markers in the status column.
   87 
   88 * Do same ANSI escape code filtering for tag matching that we do for 
   89   searching, to help when viewing syntax-highlighted code.
   90   
   91 * Catch SIGTERM and clean up before exiting.
   92 
   93 * Fix bug initializing default charset on Windows.
   94 
   95 * Handle keypad ENTER key correctly if it sends something other than newline.
   96 
   97 * Fix buffering bug when using stdin with a LESSOPEN pipe.
   98 
   99 * On Windows, allow 'u' in -D option to enable underlining.
  100 
  101 * On Windows, use underline in sgr mode.
  102 
  103 * On Windows, convert UTF-8 to multibyte if console is not UTF-8.
  104 
  105 * Update Unicode tables to 2017-03-08.
  106 
  107 * Pass-thru Unicode formating chars (Cf type) instead of treating them
  108   as binary chars. But treat them as binary if -U is set.
  109 
  110 * Fix erroneous binary file warning when UTF-8 file contains ANSI SGR sequences.
  111 
  112 * Fix bugs when using LESSOPEN and switching between stdin and other files.
  113 
  114 * Fix some bugs handling filenames containing shell metacharacters.
  115 
  116 * Fix some memory leaks.
  117 
  118 * Allow some debugging environment variables to be set in lesskey file.
  119 
  120 * Code improvements:
  121   . Use ANSI prototypes in funcs.h declarations.
  122   . Fix some const mismatches.
  123   . Remove archaic "register" in variable declarations.
  124 
  125 ======================================================================
  126 
  127 	Major changes between "less" versions 481 and 487
  128 
  129 * New commands ESC-{ and ESC-} to shift to start/end of displayed lines.
  130 
  131 * Make search highlights work correctly when changing caselessness with -i.
  132 
  133 * New option -Da in Windows version to enable SGR mode.
  134 
  135 * Fix "nothing to search" error when top or bottom line on screen is empty.
  136 
  137 * Fix bug when terminal has no "cm" termcap entry.
  138 
  139 * Fix incorrect display when entering double-width chars in search string.
  140 
  141 * Fix bug in Unicode handling that missed some double width characters.
  142 
  143 * Update Unicode database to 9.0.0.
  144 
  145 ======================================================================
  146 
  147 	Major changes between "less" versions 458 and 481
  148 
  149 * Don't overwrite history file; just append to it.
  150 
  151 * New command ESC-G goes to end of currently buffered data in a pipe.
  152 
  153 * Disable history feature when compiled with LESSHISTFILE set to "-".
  154 
  155 * In more-compatible mode, make the -p option apply to every file opened,
  156   not just the first one.
  157 
  158 * In more-compatible mode, change the -e option to work like -E, not -EF.
  159 
  160 * Treat multiple CRs before LF are like one CR (all the CRs are hidden).
  161 
  162 * Allow "extra" string in lesskey file to append to a multi-char command
  163   (like a search pattern), without executing the command.
  164 
  165 * Ignore -u/-U setting while viewing help file, so that 
  166   underline and bold chars are displayed correctly.
  167 
  168 * Improve detection of "binary" files in UTF-8 mode.
  169 
  170 * Fix bug with ++ commands.
  171 
  172 * Fix bug where prompt was sometimes not displayed with +G.
  173 
  174 * Fix possible memory corruption 
  175 
  176 * Fix bugs and improve performance in ampersand filtering.
  177 
  178 * Automate construction of Unicode tables from Unicode database.
  179 
  180 * Allow %% escape sequence in LESSOPEN variable.
  181 
  182 ======================================================================
  183 
  184 	Major changes between "less" versions 451 and 458
  185 
  186 * Allow backslash escaping of metacharacters in LESS environment variable
  187   after the --use-backslash option.
  188 
  189 * Don't quit if syntax errors are found in command line options.
  190 
  191 * Increase sizes of some internal buffers.
  192 
  193 * Fix configure bug with --with-regex=none.
  194 
  195 * Fix crash with "stty rows 0".
  196 
  197 * Fix Win32 attribute display bug.
  198 
  199 * Fix display bug when using up/down arrow on the command line.
  200 
  201 ======================================================================
  202 
  203 	Major changes between "less" versions 444 and 451
  204 
  205 * Add ESC-F command to keep reading data until a pattern is found.
  206 
  207 * Use exit code of LESSOPEN script if LESSOPEN starts with "||".
  208 
  209 * When up/down arrow is used on the command line immediately after
  210   typing text, the next command starting with that text is found.
  211 
  212 * Add support for GNU regex.
  213 
  214 * Add configure option --with-regex=none and fix compile errors
  215   when compiling with no regex library.
  216 
  217 * Fix bugs handling SGR sequences in Win32.
  218 
  219 * Fix possible crashes caused by malformed LESSOPEN or 
  220   LESSCLOSE variables.
  221 
  222 * Fix bug highlighting text which is discontiguous in the file 
  223   due to backspace processing.
  224 
  225 * Fix bug in displaying status column when scrolling backwards 
  226   with -J and -S in effect.
  227 
  228 ======================================================================
  229 
  230 	Major changes between "less" versions 443 and 444
  231 
  232 * Fix bug in unget handling that can cause strange effects on the
  233   command line.
  234 
  235 * Remove vestiges of obsolete -l option that can cause a crash.
  236 
  237 ======================================================================
  238 
  239 	Major changes between "less" versions 436 and 443
  240 
  241 * Change search behavior such that when a search is given an explicit 
  242   pattern, the entire displayed screen is included in the search and 
  243   not just the portion after the target line.
  244 
  245 * Add -A option to change search behavior to the old way: only
  246   the portion of the screen after the target line is searched.
  247 
  248 * Add %F formatting to prompt strings, replaced by the last component
  249   of the input file.
  250 
  251 * Control-G while editing a command exits the command.
  252 
  253 * Less now exits with status 2 if control-C is pressed and -K is in effect.
  254 
  255 * Fix "ungetc overflow" when passing long commands via the -p option.
  256 
  257 * Fix bug in using line filtering via the & command 
  258   in combination with -i and -I.
  259 
  260 * Fix bug in handling negative arguments to the -j option.
  261 
  262 * Fix bug in handling %t in prompt strings.
  263 
  264 * Improve handling of long option names.
  265 
  266 * Improve percentage calculation for very large files.
  267 
  268 ======================================================================
  269 
  270 	Major changes between "less" versions 429 and 436
  271 
  272 * Don't pass "-" to non-pipe LESSOPEN unless it starts with "-".
  273 
  274 * Allow a fraction as the argument to the -# (--shift) option.
  275 
  276 * Fix highlight bug when underlined/overstruck text matches at end of line.
  277 
  278 * Fix non-regex searches with ctrl-R.
  279 
  280 ======================================================================
  281 
  282 	Major changes between "less" versions 424 and 429
  283 
  284 * LESSOPEN pipe will now be used on standard input, if the LESSOPEN
  285   environment variable begins with "|-".
  286 
  287 * The -D option with one number now means use the normal background color.
  288 
  289 * Don't change permissions on history file if it is not a regular file.
  290 
  291 * Fix non-ANSI-compliant code that caused problems with some compilers.
  292 
  293 * Fix binary file detection in UTF-8 mode.
  294 
  295 * Fix display problems with long lines on "ignaw" terminals.
  296 
  297 * Fix problem interrupting the line number calculation for initial prompt.
  298 
  299 * Fix SGR emulation when dealing with multiple attributes (eg. bold+underline).
  300 
  301 * Fix highlight bug when searching for underlined/overstruck text.
  302 
  303 ======================================================================
  304 
  305 	Major changes between "less" versions 418 and 424
  306 
  307 * New "&" command allows filtering of lines based on a pattern.
  308 
  309 * Status column now displays a search match, even if the matched
  310   string is scrolled off screen because -S is in effect.
  311 
  312 * Improve behavior of -F option.
  313 
  314 * Allow CSI character (0x9B) to work in UTF-8 mode.
  315 
  316 * Output carriage return at startup in case terminal doesn't default
  317   to column 1.
  318 
  319 * Fix bug in '' (quote, quote) command after G command.
  320 
  321 ======================================================================
  322 
  323 	Major changes between "less" versions 416 and 418
  324 
  325 * Color escape sequences are now supported in WIN32 build.
  326 
  327 * Makefile now uses EXEEXT feature of autoconf.
  328 
  329 * Fix search bug when using -R and text contains ANSI color escape sequences.
  330 
  331 * Fix crash when using -r with UTF-8 text containing 0x9B bytes.
  332 
  333 * Fix display bug when using ' command to move less than one page forward.
  334 
  335 * Update GPL to version 3.
  336 
  337 ======================================================================
  338 
  339 	Major changes between "less" versions 409 and 416
  340 
  341 * New --follow-name option makes F command follow the name of a file
  342   rather than the file descriptor if an open file is renamed.
  343 
  344 * Make searching with -i/-I work correctly with non-ASCII text.
  345 
  346 * Fix DJGPP build.
  347 
  348 ======================================================================
  349 
  350 	Major changes between "less" versions 406 and 409
  351 
  352 * Support CSI escape sequences, like SGR escape sequences.
  353 
  354 * Fix bug which caused screen to fail to repaint when window is resized.
  355 
  356 * Fix bug in using -i and -I flags with non-ASCII text.
  357 
  358 * Fix configure bug on systems which don't support langinfo.h.
  359 
  360 * Fix crash when searching text containing certain invalid UTF-8 sequences.
  361 
  362 ======================================================================
  363 
  364 	Major changes between "less" versions 394 and 406
  365 
  366 * Allow decimal point in number for % (percent) command.
  367 
  368 * Allow decimal point in number for -j option (fraction of screen height).
  369 
  370 * Make n command fetch previous pattern from history file on first search.
  371 
  372 * Don't rewrite history file if it has not changed.
  373 
  374 * Don't move to bottom of screen on first page.
  375 
  376 * Don't output extraneous newlines, so copy & pasting lines from the
  377   output works better.
  378 
  379 * The -c option has been made identical with the -C option.
  380 
  381 * Allow "/dev/null" as synomym for "-" in LESSHISTFILE to indicate
  382   that no history file should be used.
  383 
  384 * Search can now find text which follows a null byte, if the PCRE
  385   library is used, or if no-regex searching (ctrl-R) is used.
  386 
  387 * Better compatibility with POSIX more specification.
  388 
  389 * Make -f work for directories.
  390 
  391 * Make "t" cmd traverse tags in the correct order.
  392 
  393 * Allow a few binary characters in the input file before warning
  394   that the file is binary.
  395 
  396 * Don't warn that file is binary if it merely contains ANSI color sequences
  397   and -R is in effect.
  398 
  399 * Update Unicode character tables.
  400 
  401 * Support DESTDIR in Makefile.
  402 
  403 * Fix bug when filename contains certain shell metacharacters such as "$".
  404 
  405 * Fix bug when resizing the window while waiting for input from a pipe.
  406 
  407 * Fix configure bugs.
  408 
  409 ======================================================================
  410 
  411 	Major changes between "less" versions 382 and 394
  412 
  413 * Add history file to save search and shell command history between
  414   invocations of less.
  415 
  416 * Improve behavior of history list for search and shell commands.
  417 
  418 * Add -K (or --quit-on-intr) option to make less exit immediately on ctrl-C.
  419 
  420 * Improve handling of UTF-8 files and commands, including better
  421   line wrapping and handling double-width chars.
  422 
  423 * Added LESSUTFBINFMT environment variable to control display of
  424   non-printable characters in a UTF-8 file.
  425 
  426 * Add --with-secure option to configure, to make it easier to
  427   build a secure version of less.
  428 
  429 * Show search matches in the status column even if search highlights
  430   are disabled via the -G option or the ESC-u command.
  431 
  432 * Improve performance when the file contains very long lines.
  433 
  434 * Add "windows" charset.
  435 
  436 * Add man page for lessecho.
  437 
  438 * Add support for erase2 character, treated same as erase.
  439 
  440 * Use ASCII lowercase/uppercase logic when operating on the command line.
  441 
  442 * Update makefile for Borland C++ 5.5.1.
  443 
  444 * Fix bug in calculating number of pages for %D prompt.
  445 
  446 * Fix bug in handling tag file error.
  447 
  448 * Fix obscure bug if input file is deleted while viewing help.
  449 
  450 * Fix bug handling filenames which include square brackets.
  451 
  452 * Fix possible buffer overflow in "global" tag search.
  453 
  454 * Fix possible buffer overflow in usage of LESSOPEN and LESSCLOSE.
  455 
  456 * Fix buffer overflow in reverse search.
  457 
  458 ======================================================================
  459 
  460 	Major changes between "less" versions 381 and 382
  461 
  462 * Removed some old copyrighted code.
  463   This probably breaks OS/9 support.
  464 
  465 ======================================================================
  466 
  467 	Major changes between "less" versions 378 and 381
  468 
  469 * New -L option to disable LESSOPEN processing.
  470 
  471 * Further support for large (64 bit) file addressing.
  472   Large file support is now set up by the configure script.
  473 
  474 * Use autoconf 2.54.
  475   Replace configure.in, acconfig.h, defines.h.top with configure.ac.
  476 
  477 * Overstriking underscore with underscore is now bold or underlined 
  478   depending on context.
  479 
  480 * Use only 7 spaces for line numbers in -N mode, if possible.
  481 
  482 * Fix some bugs in handling overstriking in UTF-8 files.
  483 
  484 * Fix some nroff issues in the man page.
  485 
  486 ======================================================================
  487 
  488 	Major changes between "less" versions 376 and 378
  489 
  490 * Bug fixes:
  491   Default buffer space is now 64K as documented.
  492   Search highlighting works properly when used with -R.
  493   Windows version works properly when input file contains carriage returns.
  494   Clean up some compiler warnings.
  495 
  496 ======================================================================
  497 
  498 	Major changes between "less" versions 358 and 376
  499 
  500 * -x option can now specify multiple variable-width tab stops.
  501 
  502 * -X option no longer disables keypad initialization.
  503   New option --no-keypad disables keypad initialization.
  504 
  505 * New commands t and T step through multiple tag matches.
  506   Added support for "global(1)" tags
  507   (see http://www.gnu.org/software/global/global.html).
  508 
  509 * New prompt style set by option -Pw defines the message printed 
  510   while waiting for data in the F command.
  511 
  512 * System-wide lesskey file now defaults to sysless in etc directory 
  513   instead of .sysless in bin directory.
  514   Use "configure --sysconfdir=..." to change it.
  515   (For backwards compatibility, .sysless in bin is still recognized.)
  516 
  517 * Pressing RightArrow or LeftArrow while entering a number now shifts
  518   the display N columns rather than editing the number itself.
  519 
  520 * Status column (enabled with -J) now shows search results.
  521 
  522 * Windows version sets window title.
  523 
  524 * Default LESSCHARSET for MS-DOS versions is now "dos".
  525 
  526 * Searching works better with ANSI (SGR) escape sequences.
  527   ANSI color escape sequences are now supported in the MS-DOS (DJGPP) version.
  528 
  529 * Improved performance in reading very large pipes.
  530 
  531 * Eliminated some dependencies on file offets being 32 bits.
  532 
  533 * Fixed problems when viewing files with very long lines.
  534 
  535 * Fixed overstriking in UTF-8 mode, and overstriking tabs.
  536 
  537 * Improved horizontal shifting of text using -R option with ANSI color.
  538 
  539 * Improved handling of filenames containing shell metacharacters.
  540 
  541 * Some fixes for EBCDIC systems.
  542 
  543 * Some fixes for OS/2 systems.
  544 
  545 ======================================================================
  546 
  547 	Major changes between "less" versions 354 and 358
  548 
  549 * Add -J (--status-column) option to display a status column.
  550 
  551 * Add -# (--shift) option to set default horizontal shift distance.
  552   Default horizontal shift distance is now one-half screen width.
  553 
  554 * Horizontal shifting does not shift line numbers if -N is in effect.
  555 
  556 * Horizontal shifting acts as though -S were set, to avoid confusion.
  557 
  558 ======================================================================
  559 
  560 
  561 	Major changes between "less" versions 352 and 354
  562 
  563 * Allow space after numeric-valued command line options.
  564 
  565 * Fix problem with configuring terminal libraries on some systems.
  566 
  567 * Add support for PCRE regular expression library.
  568 
  569 * Add --with-regex option to configure to allow manually selecting
  570   a regular expression library.
  571 
  572 * Fix bug compiling with SECURE = 1.
  573 
  574 ======================================================================
  575 
  576 
  577 	Major changes between "less" versions 346 and 352
  578 
  579 * Enable UTF-8 if "UTF-8" appears in locale-related environment variables.
  580 
  581 * Add --with-editor option to configure script.
  582 
  583 * The -M prompt and = message now show the top and bottom line number.
  584 
  585 * Fix bug in running the editor on a file whose name contains quotes, etc.
  586 
  587 * Fix bug in horizontal scrolling of long lines.
  588 
  589 * Fix bug in doing :d on a file which contains marks.
  590 
  591 * Fix bug causing cleared lines to sometimes be filled with standout, 
  592   bold, underline, etc. on certain terminals.
  593 
  594 * Fixes for MS-DOS (DJGPP) version.
  595 
  596 ======================================================================
  597 
  598 
  599 	Major changes between "less" versions 340 and 346
  600 
  601 * The UTF-8 character set is now supported.
  602 
  603 * The default character set is now latin1 rather than ascii.
  604 
  605 * New option -R (--RAW-CONTROL-CHARS) is like -r but handles 
  606   long (wrapped) lines correctly, as long as the input contains only 
  607   normal text and ANSI color escape sequences.
  608 
  609 * New option -F (--quit-if-one-screen) quits if the text fits on
  610   the first screen.
  611 
  612 * The -w option now highlights the target line of a g or p command.
  613 
  614 * A system-wide lesskey file is supported (LESSKEY_SYSTEM).
  615 
  616 * New escape for prompt strings: %c is replaced by column number.
  617 
  618 * New escape for prompt strings: %P is replaced by percentage into
  619   file, based on line number rather than byte offset.
  620 
  621 * HOME and END keys now jump to beginning of file or end of file.
  622 
  623 ======================================================================
  624 
  625 
  626 	Major changes between "less" versions 337 and 340
  627 
  628 * Command line options for less may now be given in either the old 
  629   single-letter form, or a new long name form (--option-name).
  630   See the less man page or "less --help" for the list of long option names.
  631 
  632 * Command line options for lesskey may now be given in a new long name
  633   form.  See the lesskey man page for the list of long option names.
  634 
  635 * New command -- toggles an option using the long option name.
  636 
  637 * New command __ queries an option using the long option name.
  638 
  639 * The old -- command is renamed as -!.
  640 
  641 * If a ^P is entered between the dash and the option letter of the -
  642   command, the message describing the new setting is suppressed.
  643 
  644 * Lesskey files may now contain \k escape sequences to represent the
  645   "special" keys (arrows, PAGE-UP/PAGE-DOWN, HOME, END, INSERT, DELETE).
  646 
  647 * New command :d removes the current file from the list of files.
  648 
  649 * New option -~ (like -w before version 335)
  650   suppresses tildes after end-of-file.
  651 
  652 * Less is now released under the GNU General Public License.
  653 
  654 ======================================================================
  655 
  656 
  657 	Major changes between "less" versions 335 and 337
  658 
  659 * Fixed bugs in "make install".
  660 
  661 ======================================================================
  662 
  663 
  664 	Major changes between "less" versions 332 and 335
  665 
  666 * The old -w flag (suppress tildes after end-of-file) has been removed.
  667 
  668 * New -w flag highlights the first new line after a forward-screen.
  669 
  670 * New -W flag highlights the first new line after any forward movement.
  671 
  672 * Window resize works even if LINES and/or COLUMNS environment 
  673   variables are incorrect.
  674 
  675 * New percent escapes for prompt strings:
  676   %d is replaced by the page number, and
  677   %D is replaced by the number of pages in the file.
  678 
  679 * Added charsets "iso8859" and "ebcdic".
  680 
  681 * In Windows version, uses HOMEDRIVE and HOMEPATH if HOME is not defined.
  682 
  683 * Fixed some bugs causing incorrect display on DOS/Windows.
  684 
  685 ======================================================================
  686 
  687 
  688 	Major changes between "less" versions 330 and 332
  689 
  690 * Filenames from the command line are entered into the command history,
  691   so UPARROW/DOWNARROW can be used to retrieve them from the :e command.
  692 
  693 * Now works correctly on Windows when using a scrolling terminal
  694   window (buffer larger than display window).
  695 
  696 * On Windows, now restores the console screen on exit.  
  697   Use -X to get the old behavior.
  698 
  699 * Fixed bug on Windows when CAPS-LOCK or NUM-LOCK is pressed.
  700 
  701 * Fixed bug on Windows when piping output of an interactive program.
  702 
  703 * Fixed bug in tags file processing when tags file has DOS-style
  704   line terminators (CR/LF).
  705 
  706 * Fixed compilation problem on OS/2.
  707 
  708 ======================================================================
  709 
  710 
  711 	Major changes between "less" versions 321 and 330
  712 
  713 * Now supports filenames containing spaces (in double quotes).
  714   New option -" can be used to change the quoting characters.
  715 
  716 * In filename completion, a slash is appended to a directory name.
  717   If the environment variable LESSSEPARATOR is set, the value of
  718   that variable, rather than a slash, is appended.
  719 
  720 * LeftArrow and RightArrow are same as ESC-[ and ESC-].
  721 
  722 * Added commands ESC-( and ESC-), same as ESC-[ and ESC-].
  723 
  724 * A "quit" command defined in a lesskey file may now have an "extra" 
  725   string, which is used to return an exit code from less when it quits.
  726 
  727 * New environment variables LESSMETACHARS and LESSMETAESCAPE provide
  728   more control over how less interfaces to the shell.
  729 
  730 * Ported to Microsoft Visual C compiler for Windows.
  731 
  732 * Ported to DJGPP compiler for MS-DOS.
  733 
  734 * Bug fixes.
  735 
  736 ======================================================================
  737 
  738 
  739 	Major changes between "less" versions 291 and 321
  740 
  741 * Command line at bottom of screen now scrolls, so it can be longer 
  742   than the screen width.
  743 
  744 * New commands ESC-] and ESC-[ scroll the display horizontally.
  745 
  746 * New command ESC-SPACE scrolls forward a full screen, even if it
  747   hits end-of-file.
  748 
  749 * Alternate modifiers for search commands: ^N is same as !,
  750   ^F is same as @, and ^E is same as *.
  751 
  752 * New modifier for search commands: ^K means highlight the matches
  753   currently on-screen, but don't move to the first match.
  754 
  755 * New modifier for search commands: ^R means don't use regular
  756   expressions in the search.
  757 
  758 * Environment variable LESSKEY gives name of default lesskey file.
  759 
  760 * Environment variable LESSSECURE will force less to run in
  761   "secure" mode.
  762 
  763 * Command line argument "--" signals that the rest of the arguments
  764   are files (not option flags).
  765 
  766 * Help file (less.hlp) is no longer installed.  Help text is now 
  767   embedded in the less executable itself.
  768 
  769 * Added -Ph to change the prompt for the help text.
  770   Added -Ps to change the default short prompt (same as plain -P).
  771 
  772 * Ported to the Borland C compiler for MS-DOS.
  773 
  774 * Ported to Windows 95 & Windows NT.
  775 
  776 * Ported to OS-9.
  777 
  778 * Ported to GNU Hurd.
  779 
  780 ======================================================================
  781 
  782 
  783 	Major changes between "less" versions 290 and 291
  784 
  785 * Less environment variables can be specified in lesskey files.
  786 
  787 * Fixed MS-DOS build.
  788 
  789 ======================================================================
  790 
  791 
  792 	Major changes between "less" versions 278 and 290
  793 
  794 * Accepts GNU-style options "--help" and "--version".
  795 
  796 * OS/2 version looks for less.ini in $HOME before $INIT and $PATH.
  797 
  798 * Bug fixes
  799 
  800 ======================================================================
  801 
  802 
  803 	Major changes between "less" versions 252 and 278
  804 
  805 * A LESSOPEN preprocessor may now pipe the converted file data to less,
  806   rather than writing it to a temporary file.
  807 
  808 * Search pattern highlighting has been fixed.  It now highlights 
  809   reliably, even if a string is split across two screen lines,
  810   contains TABs, etc.
  811 
  812 * The -F flag (which suppress search highlighting) has been changed 
  813   to -G.  A new flag, -g, changes search highlighting to highlight 
  814   only the string found by the last search command, instead of all 
  815   strings which match the last search command.
  816 
  817 * New flag -I acts like -i, but ignores case even if the search 
  818   pattern contains uppercase letters.
  819 
  820 * Less now checks for the environment variable VISUAL before EDITOR.
  821 
  822 * Ported to OS/2.
  823 
  824 ======================================================================
  825 
  826 
  827 	Major changes between "less" versions 237 and 252
  828 
  829 * Changes in line-editing keys:
  830   The literal key is now ^V or ^A rather than \ (backslash).
  831   Filename completion commands (TAB and ^L) are disabled 
  832   when typing a search pattern.
  833 
  834 * Line-editing command keys can be redefined using lesskey.
  835 
  836 * Lesskey with no input file defaults to $HOME/.lesskey
  837   rather than standard input.
  838 
  839 * New option -V displays version number of less.
  840 
  841 * New option -V displays version number of lesskey.
  842 
  843 * Help file less.hlp is now installed by default in /usr/local/share 
  844   rather than /usr/local/lib.
  845 
  846 
  847 ======================================================================
  848 
  849 
  850 	Major changes between "less" versions 170 and 237
  851 
  852 * By popular demand, text which matches the current search pattern
  853   is highlighted.  New -F flag disables this feature.
  854 
  855 * Henry Spencer's regexp.c is now included, for systems which do not
  856   have a regular expression library.
  857   regexp.c is Copyright (c) 1986 by University of Toronto.
  858 
  859 * New line-editing keys, including command history (arrow keys) and 
  860   filename completion (TAB).
  861 
  862 * Input preprocessor allows modification of input files (e.g. uncompress)
  863   via LESSOPEN/LESSCLOSE environment variables.
  864 
  865 * New -X flag disables sending termcap "ti" and "te" (initialize and
  866   deinitialize) strings to the terminal. 
  867 
  868 * Changing -i from within less now correctly affects a subsequent
  869   repeated search.  
  870 
  871 * Searching for underlined or overstruck text now works when the -u
  872   flag is in effect, rather than the -i flag.
  873 
  874 * Use setlocale (LANG and LC_CTYPE environment variables) to determine
  875   the character set if LESSCHARSET/LESSCHARDEF are not set.
  876 
  877 * The default format for displaying binary characters is now standout
  878   (reverse video) rather than blinking.  This can still be changed by
  879   setting the LESSBINFMT environment variable.
  880 
  881 * Use autoconf installation technology.
  882 
  883 * Ported to MS-DOS.
  884 
  885         ********************************
  886           Things that may surprise you
  887         ********************************
  888 
  889 * When you enter text at the bottom of the screen (search string, 
  890   filename, etc.), some keys act different than previously.  
  891   Specifically, \ (backslash), ESC, TAB, BACKTAB, and control-L 
  892   now have line editing functions.
  893 
  894 * Some previous unofficial versions of less were able to display
  895   compressed files.  The new LESSOPEN/LESSCLOSE feature now provides
  896   this functionality in a different way.
  897 
  898 * Some previous unofficial versions of less provided a -Z flag to 
  899   set the number of lines of text to retain between full screen scrolls.
  900   The -z-n flag (that is, -z with a negative number) provides this 
  901   functionality.
  902 
  903 
  904 ======================================================================
  905 
  906 
  907 	Major changes between "less" versions 123 and 170
  908 
  909 * New option -j allows target lines to be positioned anywhere on screen.
  910 
  911 * New option -S truncates displayed line at the screen width,
  912   rather than wrapping onto the next line.
  913 
  914 * New option -y limits amount of forward scroll.
  915 
  916 * New option -T specifies a "tags" file.
  917 
  918 * Non-printable, non-control characters are displayed in octal.
  919   Such characters, as well as control characters, are displayed 
  920   in blinking mode.
  921 
  922 * New command -+ sets an option to its default.
  923 * New command -- sets an option to the opposite of its default.
  924 
  925 * Lesskey file may have a string appended to a key's action,
  926   which acts as though typed in after the command.
  927 
  928 * New commands ESC-^F and ESC-^B match arbitrary types of brackets.
  929 
  930 * New command F monitors a growing file (like "tail -f").
  931 
  932 * New command | pipes a section of the input file into a shell command.
  933 
  934 * New command :x directly jumps to a file in the command line list.
  935 
  936 * Search commands have been enhanced and reorganized:
  937 	n	Repeat search, same direction.
  938 	N	Repeat search, opposite direction.
  939 	ESC-/	Search forward thru file boundaries
  940 	ESC-?	Search backward thru file boundaries
  941 	ESC-n	Repeat search thru file boundaries, same direction.
  942 	ESC-N	Repeat search thru file boundaries, opposite direction.
  943   Special character * causes search to search thru file boundaries.
  944   Special character @ causes search to begin at start/end of file list.
  945 
  946 * Examining a new file adds it to the command line list.
  947   A list of files, or an expression which matches more than one file,
  948   may be examined; all of them are added to the command line list.
  949 
  950 * Environment variables LESSCHARSET and LESSCHARDEF can define
  951   a non-ASCII character set.
  952 
  953 * Partial support for MSDOS, including options -R for repainting screen
  954   on quit, -v/-V to select video mode, and -W to change window size.
  955 
  956 
  957 ======================================================================
  958 
  959 
  960 	Major changes between "less" versions 97 and 123
  961 
  962 * New option (-N) causes line numbers to be displayed in the
  963   text of the file (like vi "set nu").
  964 
  965 * New option (-?) prints help message immediately.
  966 
  967 * New option (-r) displays "raw" control characters, without
  968   mapping them to ^X notation.
  969 
  970 * New option (-f) forces less to open non-regular files
  971   (directories, etc).
  972 
  973 * New option (-k) can be used to specify lesskey files by name.
  974 
  975 * New option (-y) can be used to set a forward scroll limit
  976   (like -h sets a backward scroll limit).
  977 
  978 * File marks (set by the m command) are now preserved when a new
  979   file is edited.  The ' command can thus be used to switch files.
  980 
  981 * New command ESC-/ searches all files (on the command line) 
  982   for a pattern.
  983 
  984 * New command ESC-n repeats previous search, spanning files.
  985 
  986 * The N command has been changed to repeat the previous search
  987   in the reverse direction.  The old N command is still available 
  988   via :n.
  989 
  990 * New command ESC-N repeats previous search in the reverse
  991   direction and spanning files.
  992 
  993 * 8 bit characters are now supported.  A new option (-g) can be 
  994   used to strip off the eighth bit (the previous behavior).
  995 
  996 * Options which take a following string (like -t) may now
  997   optionally have a space between the option letter and the string.
  998 
  999 * Six new commands { } ( ) [ and ] can be used to match
 1000   brackets of specific types, similar to vi % command.
 1001 
 1002 * New commands z and w move forward/backward one window and
 1003   simultaneously set the window size.
 1004 
 1005 * Prompt string expansion now has %L for line number of the last
 1006   line in the file, and %E for the name of the editor.
 1007   Also, % escapes which refer to a line (b=bottom, t=top, etc.)
 1008   can use j for the jump target line.
 1009 
 1010 * New environment variable LESSEDIT can be used to tailor the
 1011   command string passed to the editor by the v command.
 1012 
 1013 * Examining a file which was previously examined will return
 1014   to the same position in the file.
 1015 
 1016 * A "%" is expanded to the current filename and a "#" to the 
 1017   previous filename, in both shell commands and the E command.
 1018   (Previously % worked only in shell commands and # worked 
 1019   only in the E command.)
 1020 
 1021 * New command ":ta" is equivalent to "-t".
 1022 
 1023 * New command "s" is equivalent to "-l".
 1024 
 1025 * The - command may be followed by "+X" to revert to the default
 1026   for option X, or "-X" to get the opposite of the default.
 1027 
 1028 * Lesskey files may now include characters after the action as
 1029   extra input to be parsed after the action; for example:
 1030   "toggle-option X" to toggle a specific option X.
 1031 
 1032 
 1033 
 1034 
 1035