Merge pull request #2943 from Pyrohh/rm-posix

[RDY] Remove POSIX 'cpoptions'

Reviewed-by: Felipe Morales <hel.sheep@gmail.com>
Reviewed-by: Marco Hinz <mh.codebro@gmail.com>

runtime/doc/change.txt

@@ -714,9 +714,6 @@ When the {string} starts with "\=" it is evaluated as an expression, see
 characters.
 
 Otherwise these characters in {string} have a special meaning:
-								*:s%*
-When {string} is equal to "%" and '/' is included with the 'cpoptions' option,
-then the {string} of the previous substitute command is used, see |cpo-/|
 
 magic	nomagic	  action    ~
   &	  \&	  replaced with the whole matched pattern	     *s/\&*

runtime/doc/intro.txt

@@ -269,11 +269,6 @@ Vi	"the original".  Without further remarks this is the version
 	to.  Only runs under Unix.  Source code only available with a
 	license.  More information on Vi can be found through:
 		http://vi-editor.org	[doesn't currently work...]
-							*Posix*
-Posix	From the IEEE standard 1003.2, Part 2: Shell and utilities.
-	Generally known as "Posix".  This is a textual description of
-	how Vi is supposed to work.
-	See |posix-compliance|.
 							*Nvi*
 Nvi	The "New" Vi.  The version of Vi that comes with BSD 4.4 and FreeBSD.
 	Very good compatibility with the original Vi, with a few extensions.

runtime/doc/motion.txt

@@ -469,9 +469,7 @@ the macros ".IP", ".LP", etc.  (These are nroff macros, so the dot must be in
 the first column).  A section boundary is also a paragraph boundary.
 Note that a blank line (only containing white space) is NOT a paragraph
 boundary.
-Also note that this does not include a '{' or '}' in the first column.  When
+Note: this does not include a '{' or '}' in the first column.
-the '{' flag is in 'cpoptions' then '{' in the first column is used as a
-paragraph boundary |posix|.
 
 							*section*
 A section begins after a form-feed (<C-L>) in the first column and at each of

runtime/doc/options.txt

@@ -1493,8 +1493,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 'columns' 'co'		number	(default 80 or terminal width)
 			global
 	Number of columns of the screen.  Normally this is set by the terminal
-	initialization and does not have to be set by hand.  Also see
+	initialization and does not have to be set by hand.
-	|posix-screen-size|.
 	When Vim is running in the GUI or in a resizable window, setting this
 	option will cause the window size to be changed.  When you only want
 	to use the size for the GUI, put the command in your |gvimrc| file.
@@ -1701,10 +1700,6 @@ A jump table for the options with a short description can be found at |Q_op|.
 	Commas can be added for readability.
 	To avoid problems with flags that are added in the future, use the
 	"+=" and "-=" feature of ":set" |add-option-flags|.
-	NOTE: This option is set to the POSIX default value at startup when
-	the Vi default value would be used and the $VIM_POSIX environment
-	variable exists |posix|.  This means Vim tries to behave like the
-	POSIX specification.
 
 	    contains	behavior	~
 								*cpo-a*
@@ -1802,7 +1797,6 @@ A jump table for the options with a short description can be found at |Q_op|.
 			See |/[]|
 			   'l' included: "/[ \t]"  finds <Space>, '\' and 't'
 			   'l' excluded: "/[ \t]"  finds <Space> and <Tab>
-			Also see |cpo-\|.
 								*cpo-L*
 		L	When the 'list' option is set, 'wrapmargin',
 			'textwidth', 'softtabstop' and Virtual Replace mode
@@ -1942,38 +1936,6 @@ A jump table for the options with a short description can be found at |Q_op|.
 			the cursor would skip over it and jump to the
 			following occurrence.
 
-	POSIX flags.  These are not included in the Vi default value, except
-	when $VIM_POSIX was set on startup. |posix|
-
-	    contains	behavior	~
-								*cpo-#*
-		#	A count before "D", "o" and "O" has no effect.
-								*cpo-&*
-		&	When ":preserve" was used keep the swap file when
-			exiting normally while this buffer is still loaded.
-			This flag is tested when exiting.
-								*cpo-\*
-		\	Backslash in a [] range in a search pattern is taken
-			literally, only "\]" is special  See |/[]|
-			   '\' included: "/[ \-]"  finds <Space>, '\' and '-'
-			   '\' excluded: "/[ \-]"  finds <Space> and '-'
-			Also see |cpo-l|.
-								*cpo-/*
-		/	When "%" is used as the replacement string in a |:s|
-			command, use the previous replacement string. |:s%|
-								*cpo-{*
-		{	The |{| and |}| commands also stop at a "{" character
-			at the start of a line.
-								*cpo-.*
-		.	The ":chdir" and ":cd" commands fail if the current
-			buffer is modified, unless ! is used.  Vim doesn't
-			need this, since it remembers the full path of an
-			opened file.
-								*cpo-bar*
-		|	The value of the $LINES and $COLUMNS environment
-			variables overrule the terminal size values obtained
-			with system specific functions.
-
 						*'cryptmethod'* *'cm'*
 'cryptmethod'		Removed. |vim-differences| {Nvim}
 
@@ -4157,7 +4119,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 			global
 	Number of lines of the Vim window.
 	Normally you don't need to set this.  It is done automatically by the
-	terminal initialization code.  Also see |posix-screen-size|.
+	terminal initialization code.
 	When Vim is running in the GUI or in a resizable window, setting this
 	option will cause the window size to be changed.  When you only want
 	to use the size for the GUI, put the command in your |gvimrc| file.
@@ -5630,8 +5592,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	function to get the effective shiftwidth value.
 
 						*'shortmess'* *'shm'*
-'shortmess' 'shm'	string	(Vim default "filnxtToO", Vi default: "",
+'shortmess' 'shm'	string	(Vim default "filnxtToO", Vi default: "")
-							POSIX default: "A")
 			global
 	This option helps to avoid all the |hit-enter| prompts caused by file
 	messages, for example  with CTRL-G, and to avoid some other messages.

runtime/doc/recover.txt

@@ -111,10 +111,6 @@ command:
 					*:pre* *:preserve* *E313* *E314*
 :pre[serve]		Write all text for all buffers into swap file.  The
 			original file is no longer needed for recovery.
-			This sets a flag in the current buffer.  When the '&'
-			flag is present in 'cpoptions' the swap file will not
-			be deleted for this buffer when Vim exits and the
-			buffer is still loaded |cpo-&|.
 
 A Vim swap file can be recognized by the first six characters: "b0VIM ".
 After that comes the version number, e.g., "3.0".

runtime/doc/todo.txt

@@ -1994,71 +1994,6 @@ Awaiting updated patches:
 -   Patch for "paranoid mode" by Kevin Collins, March 7.  Needs much more work.
 
 
-Vi incompatibility:
--   Try new POSIX tests, made after my comments. (Geoff Clare, 2005 April 7)
-    Version 1.5 is in ~/src/posix/1.5. (Lynne Canal)
-8   With undo/redo only marks in the changed lines should be changed.  Other
-    marks should be kept.  Vi keeps each mark at the same text, even when it
-    is deleted or restored. (Webb)
-    Also: A mark is lost after: make change, undo, redo and undo.
-    Example: "{d''" then "u" then "d''": deletes an extra line, because the ''
-    position is one line down. (Veselinovic)
-8   When stdin is not a tty, and Vim reads commands from it, an error should
-    make Vim exit.
-7   Unix Vim (not gvim): Typing CTRL-C in Ex mode should finish the line
-    (currently you can continue typing, but it's truncated later anyway).
-    Requires a way to make CTRL-C interrupt select() when in cooked input.
-8   When loading a file in the .exrc, Vi loads the argument anyway.  Vim skips
-    loading the argument if there is a file already.  When no file argument
-    given, Vi starts with an empty buffer, Vim keeps the loaded file. (Bearded)
-6   In Insert mode, when using <BS> or <Del>, don't wipe out the text, but
-    only move back the cursor.	Behaves like '$' in 'cpoptions'.  Use a flag
-    in 'cpoptions' to switch this on/off.
-8   When editing a file which is a symbolic link, and then opening another
-    symbolic link on the same file, Vim uses the name of the first one.
-    Adjust the file name in the buffer to the last one used?  Use several file
-    names in one buffer???
-    Also: When first editing file "test", which is symlink to "test2", and
-    then editing "test2", you end up editing buffer "test" again.  It's not
-    logical that the name that was first used sticks with the buffer.
-7   The ":undo" command works differently in Ex mode.  Edit a file, make some
-    changes, "Q", "undo" and _all_ changes are undone, like the ":visual"
-    command was one command.
-    On the other hand, an ":undo" command in an Ex script only undoes the last
-    change (e.g., use two :append commands, then :undo).
-7   The ":map" command output overwrites the command.  Perhaps it should keep
-    the ":map" when it's used without arguments?
-7   CTRL-L is not the end of a section?  It is for Posix!  Make it an option.
-7   Implement 'prompt' option.	Init to off when stdin is not a tty.
-7   CTRL-T in Insert mode inserts 'shiftwidth' of spaces at the cursor.  Add a
-    flag in 'cpoptions' for this.
-7   Add a way to send an email for a crashed edit session.  Create a file when
-    making changes (containing name of the swap file), delete it when writing
-    the file.  Supply a program that can check for crashed sessions (either
-    all, for a system startup, or for one user, for in a .login file).
-7   Vi doesn't do autoindenting when input is not from a tty (in Ex mode).
-7   "z3<CR>" should still use the whole window, but only redisplay 3 lines.
-7   ":tag xx" should move the cursor to the first non-blank.  Or should it go
-    to the match with the tag?	Option?
-7   Implement 'autoprint'/'ap' option.
-7   Add flag in 'cpoptions' that makes <BS> after a count work like <Del>
-    (Sayre).
-7   Add flag in 'cpoptions' that makes operator (yank, filter) not move the
-    cursor, at least when cancelled. (default Vi compatible).
-7   This Vi-trick doesn't work: "Q" to go to Ex mode, then "g/pattern/visual".
-    In Vi you can edit in visual mode, and when doing "Q" you jump to the next
-    match.  Nvi can do it too.
-7   Support '\' for line continuation in Ex mode for these commands: (Luebking)
-	g/./a\		    g/pattern1/ s/pattern2/rep1\\
-	line 1\		    line 2\\
-	line 2\		    line 3\\
-	.		    line4/
-6   ":e /tmp/$tty" doesn't work.  ":e $uid" does.  Is $tty not set because of
-    the way the shell is started?
-6   Vi compatibility (optional): make "ia<CR><ESC>10." do the same strange
-    thing.  (only repeat insert for the first line).
-
-
 MSDOS and Win32:
 8   Should $USERPROFILE be preferred above $HOMEDRIVE/$HOMEPATH?  No, but it's
     a good fallback, thus use:

runtime/doc/vi_diff.txt

@@ -10,17 +10,12 @@ Throughout the help files differences between Vim and Vi/Ex are given in
 curly braces, like "{not in Vi}".  This file only lists what has not been
 mentioned in other files and gives an overview.
 
-Vim is mostly POSIX 1003.2-1 compliant.  The only command known to be missing
-is ":open".  There are probably a lot of small differences (either because Vim
-is missing something or because Posix is beside the mark).
-
 1. Simulated command			|simulated-command|
 2. Missing options			|missing-options|
 3. Limits				|limits|
 4. The most interesting additions	|vim-additions|
 5. Other vim features			|other-features|
 6. Command-line arguments		|cmdline-arguments|
-7. POSIX compliance			|posix-compliance|
 
 ==============================================================================
 1. Simulated command					*simulated-command*
@@ -919,59 +914,5 @@ Only Vim is able to accept options in between and after the file names.
 
 @{cmdfile}	Vile: use {cmdfile} as startup file.
 
-==============================================================================
-7. POSIX compliance				*posix* *posix-compliance*
-
-In 2005 the POSIX test suite was run to check the compatibility of Vim.  Most
-of the test was executed properly.  There are the few things where Vim
-is not POSIX compliant, even when run in Vi compatibility mode.
-
-Set the $VIM_POSIX environment variable to have 'cpoptions' include the POSIX
-flags when Vim starts up.  This makes Vim run as POSIX as it can.  That's
-a bit different from being Vi compatible.
-
-This is where Vim does not behave as POSIX specifies and why:
-
-							*posix-screen-size*
-	The $COLUMNS and $LINES environment variables are ignored by Vim if
-	the size can be obtained from the terminal in a more reliable way.
-	Add the '|' flag to 'cpoptions' to have $COLUMNS and $LINES overrule
-	sizes obtained in another way.
-
-	The "{" and "}" commands don't stop at a "{" in the original Vi, but
-	POSIX specifies it does.  Add the '{' flag to 'cpoptions' if you want
-	it the POSIX way.
-
-	The "D", "o" and "O" commands accept a count.  Also when repeated.
-	Add the '#' flag to 'cpoptions' if you want to ignore the count.
-
-	The ":cd" command fails if the current buffer is modified when the '.'
-	flag is present in 'cpoptions'.
-
-	There is no ATTENTION message, the "A" flag is added to 'shortmess'.
-
-These are remarks about running the POSIX test suite:
-- vi test 33 sometimes fails for unknown reasons
-- vi test 250 fails; behavior will be changed in a new revision
-    http://www.opengroup.org/austin/mailarchives/ag-review/msg01710.html
-    (link no longer works, perhaps it's now:
-    https://www.opengroup.org/sophocles/show_mail.tpl?CALLER=show_archive.tpl&source=L&listname=austin-review-l&id=1711)
-- vi test 310 fails; exit code non-zero when any error occurred?
-- ex test 24 fails because test is wrong.  Changed between SUSv2 and SUSv3.
-- ex tests 47, 48, 49, 72, 73 fail because .exrc file isn't read in silent
-  mode and $EXINIT isn't used.
-- ex tests 76, 78 fail because echo is used instead of printf. (fixed)
-    Also: problem with \s not changed to space.
-- ex test 355 fails because 'window' isn't used for "30z".
-- ex test 368 fails because shell command isn't echoed in silent mode.
-- ex test 394 fails because "=" command output isn't visible in silent mode.
-- ex test 411 fails because test file is wrong, contains stray ':'.
-- ex test 475 and 476 fail because reprint output isn't visible in silent mode.
-- ex test 480 and 481 fail because the tags file has spaces instead of a tab.
-- ex test 502 fails because .exrc isn't read in silent mode.
-- ex test 509 fails because .exrc isn't read in silent mode. and exit code is
-  1 instead of 2.
-- ex test 534 fails because .exrc isn't read in silent mode.
-
 
  vim:tw=78:ts=8:ft=help:norl:

runtime/doc/vim_diff.txt

@@ -135,6 +135,7 @@ Highlight groups:
   |hl-VisualNOS|
 
 Other options:
+  'cpoptions' ('g', 'w', 'H', '*', '-', 'j', and all POSIX flags were removed)
   'guioptions' (only the 't' flag was removed)
   'guipty'
   'macatsui'

src/nvim/ex_cmds.c

@@ -3472,18 +3472,8 @@ void do_sub(exarg_T *eap)
     }
 
     if (!eap->skip) {
-      /* In POSIX vi ":s/pat/%/" uses the previous subst. string. */
+      xfree(old_sub);
-      if (STRCMP(sub, "%") == 0
+      old_sub = vim_strsave(sub);
-          && vim_strchr(p_cpo, CPO_SUBPERCENT) != NULL) {
-        if (old_sub == NULL) {          /* there is no previous command */
-          EMSG(_(e_nopresub));
-          return;
-        }
-        sub = old_sub;
-      } else {
-        xfree(old_sub);
-        old_sub = vim_strsave(sub);
-      }
     }
   } else if (!eap->skip) {    /* use previous pattern and substitution */
     if (old_sub == NULL) {      /* there is no previous command */

src/nvim/ex_docmd.c

@@ -6834,12 +6834,6 @@ void ex_cd(exarg_T *eap)
   {
     if (allbuf_locked())
       return;
-    if (vim_strchr(p_cpo, CPO_CHDIR) != NULL && curbufIsChanged()
-        && !eap->forceit) {
-      EMSG(_(
-              "E747: Cannot change directory, buffer is modified (add ! to override)"));
-      return;
-    }
 
     /* ":cd -": Change to previous directory */
     if (STRCMP(new_dir, "-") == 0) {

src/nvim/memline.c

@@ -587,8 +587,7 @@ void ml_close(buf_T *buf, int del_file)
 void ml_close_all(int del_file)
 {
   FOR_ALL_BUFFERS(buf) {
-    ml_close(buf, del_file && ((buf->b_flags & BF_PRESERVED) == 0
+    ml_close(buf, del_file && ((buf->b_flags & BF_PRESERVED) == 0));
-                               || vim_strchr(p_cpo, CPO_PRESERVE) == NULL));
   }
   spell_delete_wordlist();      /* delete the internal wordlist */
   vim_deltempdir();             /* delete created temp directory */

src/nvim/normal.c

@@ -5735,22 +5735,10 @@ static void nv_optrans(cmdarg_T *cap)
   static char_u *str = (char_u *)"xXDCsSY&";
 
   if (!checkclearopq(cap->oap)) {
-    /* In Vi "2D" doesn't delete the next line.  Can't translate it
+    if (cap->count0) {
-     * either, because "2." should also not use the count. */
+      stuffnumReadbuff(cap->count0);
-    if (cap->cmdchar == 'D' && vim_strchr(p_cpo, CPO_HASH) != NULL) {
-      cap->oap->start = curwin->w_cursor;
-      cap->oap->op_type = OP_DELETE;
-      set_op_var(OP_DELETE);
-      cap->count1 = 1;
-      nv_dollar(cap);
-      finish_op = true;
-      ResetRedobuff();
-      AppendCharToRedobuff('D');
-    } else {
-      if (cap->count0)
-        stuffnumReadbuff(cap->count0);
-      stuffReadbuff(ar[(int)(vim_strchr(str, cap->cmdchar) - str)]);
     }
+    stuffReadbuff(ar[(int)(vim_strchr(str, cap->cmdchar) - str)]);
   }
   cap->opcount = 0;
 }
@@ -6548,9 +6536,6 @@ static void n_opencmd(cmdarg_T *cap)
             0, 0)) {
       if (curwin->w_p_cole > 0 && oldline != curwin->w_cursor.lnum)
         update_single_line(curwin, oldline);
-      /* When '#' is in 'cpoptions' ignore the count. */
-      if (vim_strchr(p_cpo, CPO_HASH) != NULL)
-        cap->count1 = 1;
       invoke_edit(cap, false, cap->cmdchar, true);
     }
   }

src/nvim/option.c

@@ -1724,12 +1724,6 @@ void set_init_1(void)
   /* Be nocompatible */
   p_cp = FALSE;
 
-  /* Use POSIX compatibility when $VIM_POSIX is set. */
-  if (os_env_exists("VIM_POSIX")) {
-    set_string_default("cpo", (char_u *)CPO_ALL);
-    set_string_default("shm", (char_u *)"A");
-  }
-
   /*
    * Find default value for 'shell' option.
    * Don't use it if it is empty.
@@ -4226,7 +4220,7 @@ did_set_string_option (
     if (varp == &p_shm)
       p = (char_u *)SHM_ALL;
     else if (varp == &(p_cpo))
-      p = (char_u *)CPO_ALL;
+      p = (char_u *)CPO_VI;
     else if (varp == &(curbuf->b_p_fo))
       p = (char_u *)FO_ALL;
     else if (varp == &curwin->w_p_cocu)

src/nvim/option_defs.h

@@ -128,21 +128,11 @@
 #define CPO_PLUS        '+'     /* ":write file" resets 'modified' */
 #define CPO_SPECI       '<'     /* don't recognize <> in mappings */
 #define CPO_REGAPPEND   '>'     /* insert NL when appending to a register */
-/* POSIX flags */
-#define CPO_HASH        '#'     /* "D", "o" and "O" do not use a count */
-#define CPO_PARA        '{'     /* "{" is also a paragraph boundary */
-#define CPO_TSIZE       '|'     /* $LINES and $COLUMNS overrule term size */
-#define CPO_PRESERVE    '&'     /* keep swap file after :preserve */
-#define CPO_SUBPERCENT  '/'     /* % in :s string uses previous one */
-#define CPO_BACKSL      '\\'    /* \ is not special in [] */
-#define CPO_CHDIR       '.'     /* don't chdir if buffer is modified */
 #define CPO_SCOLON      ';'     /* using "," and ";" will skip over char if
                                  * cursor would not move */
-/* default values for Vim, Vi and POSIX */
+/* default values for Vim and Vi */
 #define CPO_VIM         "aABceFs"
 #define CPO_VI          "aAbBcCdDeEfFiIJkKlLmMnoOpPqrRsStuvWxXyZ$!%+<>;"
-#define CPO_ALL \
-  "aAbBcCdDeEfFiIJkKlLmMnoOpPqrRsStuvWxXyZ$!%+<>#{|&/\\.;"
 
 /* characters for p_ww option: */
 #define WW_ALL          "bshl<>[],~"

src/nvim/regexp.c

@@ -1120,12 +1120,10 @@ static int get_coll_element(char_u **pp)
 }
 
 static int reg_cpo_lit; /* 'cpoptions' contains 'l' flag */
-static int reg_cpo_bsl; /* 'cpoptions' contains '\' flag */
 
 static void get_cpo_flags(void)
 {
   reg_cpo_lit = vim_strchr(p_cpo, CPO_LITERAL) != NULL;
-  reg_cpo_bsl = vim_strchr(p_cpo, CPO_BACKSL) != NULL;
 }
 
 /*
@@ -1149,7 +1147,6 @@ static char_u *skip_anyof(char_u *p)
       if (*p != ']' && *p != NUL)
         mb_ptr_adv(p);
     } else if (*p == '\\'
-               && !reg_cpo_bsl
                && (vim_strchr(REGEXP_INRANGE, p[1]) != NULL
                    || (!reg_cpo_lit && vim_strchr(REGEXP_ABBR, p[1]) != NULL)))
       p += 2;
@@ -2222,7 +2219,7 @@ collection:
               }
 
               /* Handle \o40, \x20 and \u20AC style sequences */
-              if (endc == '\\' && !reg_cpo_lit && !reg_cpo_bsl)
+              if (endc == '\\' && !reg_cpo_lit)
                 endc = coll_get_char();
 
               if (startc > endc)
@@ -2245,10 +2242,8 @@ collection:
            * Only "\]", "\^", "\]" and "\\" are special in Vi.  Vim
            * accepts "\t", "\e", etc., but only when the 'l' flag in
            * 'cpoptions' is not included.
-           * Posix doesn't recognize backslash at all.
            */
           else if (*regparse == '\\'
-                   && !reg_cpo_bsl
                    && (vim_strchr(REGEXP_INRANGE, regparse[1]) != NULL
                        || (!reg_cpo_lit
                            && vim_strchr(REGEXP_ABBR,

src/nvim/regexp_nfa.c

@@ -1584,10 +1584,8 @@ collection:
          * Only "\]", "\^", "\]" and "\\" are special in Vi.  Vim
          * accepts "\t", "\e", etc., but only when the 'l' flag in
          * 'cpoptions' is not included.
-         * Posix doesn't recognize backslash at all.
          */
         if (*regparse == '\\'
-            && !reg_cpo_bsl
             && regparse + 1 <= endp
             && (vim_strchr(REGEXP_INRANGE, regparse[1]) != NULL
                 || (!reg_cpo_lit

src/nvim/search.c

@@ -2199,7 +2199,6 @@ findpar (
   linenr_T curr;
   bool did_skip;            /* true after separating lines have been skipped */
   bool first;               /* true on first line */
-  int posix = (vim_strchr(p_cpo, CPO_PARA) != NULL);
   linenr_T fold_first;      /* first line of a closed fold */
   linenr_T fold_last;       /* last line of a closed fold */
   bool fold_skipped;        /* true if a closed fold was skipped this
@@ -2220,12 +2219,7 @@ findpar (
         fold_skipped = true;
       }
 
-      /* POSIX has it's own ideas of what a paragraph boundary is and it
+      if (!first && did_skip && startPS(curr, what, both))
-       * doesn't match historical Vi: It also stops at a "{" in the
-       * first column and at an empty line. */
-      if (!first && did_skip && (startPS(curr, what, both)
-                                 || (posix && what == NUL && *ml_get(curr) ==
-                                     '{')))
         break;
 
       if (fold_skipped)

src/nvim/testdir/test80.in

@@ -126,10 +126,6 @@ TEST_6:
 STARTTEST
 :set magic&
 :$put =\"\n\nTEST_6:\"
-:set cpo+=/
-:$put =substitute('A', 'A', 'a', '')
-:$put =substitute('B', 'B', '%', '')
-:set cpo-=/
 :$put =substitute('C', 'C', 'c', '')
 :$put =substitute('D', 'D', '%', '')
 /^TEST_7

src/nvim/testdir/test80.ok

@@ -94,8 +94,6 @@ A123456789987654321
 
 
 TEST_6:
-a
-%
 c
 %