patch 9.2.1230: pattern address with delimiter in collection not skipped

Problem:  Commands with a pattern address containing the delimiter in a
          collection fail (after v7.4.530).
Solution: Skip the delimiter when it appears in a pattern collection
          (Doug Kearns).

closes: #21554

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/ex_docmd.c

@@ -4451,7 +4451,6 @@ skip_range(
     int		*ctx)		// pointer to xp_context or NULL
 {
     char_u	*cmd = cmd_start;
-    unsigned	delim;
 
     while (vim_strchr((char_u *)" \t0123456789.$%'/?-+,;\\", *cmd) != NULL)
     {
@@ -4480,10 +4479,7 @@ skip_range(
 	}
 	else if (*cmd == '/' || *cmd == '?')
 	{
-	    delim = *cmd++;
-	    while (*cmd != NUL && *cmd != delim)
-		if (*cmd++ == '\\' && *cmd != NUL)
-		    ++cmd;
+	    cmd = skip_regexp(cmd + 1, *cmd, magic_isset());
 	    if (*cmd == NUL && ctx != NULL)
 		*ctx = EXPAND_NOTHING;
 	}

src/testdir/test_cmdline.vim

@@ -1545,6 +1545,12 @@ func Test_cmdline_complete_various()
   call feedkeys(":1,2\"\<C-A>\<C-B>\"\<CR>", 'xt')
   call assert_equal("\"1,2\"\<C-A>", @:)
 
+  " completion for command after a pattern address (containing delimiter)
+  call feedkeys(":/foo[/]bar\\/baz/num\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"/foo[/]bar\\/baz/number", @:)
+  call feedkeys(":?foo[?]bar\\?baz?num\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"?foo[?]bar\\?baz?number", @:)
+
   " completion for :k command
   call feedkeys(":ka\<C-A>\<C-B>\"\<CR>", 'xt')
   call assert_equal("\"ka\<C-A>", @:)
@@ -2684,6 +2690,18 @@ func Test_zero_line_search()
   q!
 endfunc
 
+func Test_pattern_address_with_command()
+  new
+  call setline(1, ["one", "two - foo/bar/baz", "three - foo?bar?baz", "four"])
+  call cursor(1, 1)
+  :/foo[/]bar\/baz/print
+  call assert_equal("two - foo/bar/baz", getline('.'))
+  call cursor("$", 1)
+  :?foo[?]bar\?baz?print
+  call assert_equal("three - foo?bar?baz", getline('.'))
+  bwipe!
+endfunc
+
 func Test_read_shellcmd()
   CheckUnix
   if executable('ls')

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1230,
 /**/
     1229,
 /**/