patch 9.1.1526: completion: search completion match may differ in case

Problem:  completion: search completion match may differ in case
          (techntools)
Solution: add "exacttext" to 'wildoptions' value (Girish Palya)

This flag does the following:

exacttext
      When this flag is present, search pattern completion
      (e.g., in |/|, |?|, |:s|, |:g|, |:v|, and |:vim|)
      shows exact buffer text as menu items, without
      preserving regex artifacts like position
      anchors (e.g., |/\<|). This provides more intuitive
      menu items that match the actual buffer text. However,
      searches may be less accurate since the pattern is not
      preserved exactly.
      By default, Vim preserves the typed pattern (with
      anchors) and appends the matched word. This preserves
      search correctness, especially when using regular
      expressions or with 'smartcase' enabled. However, the
      case of the appended matched word may not exactly
      match the case of the word in the buffer.

fixes: #17654
closes: #17667

Signed-off-by: Girish Palya <girishji@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 034c04f..e71f0d6 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.1.  Last change: 2025 Jul 05
+*options.txt*	For Vim version 9.1.  Last change: 2025 Jul 08
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -9759,6 +9759,7 @@
 <	'wildchar' also enables completion in search pattern contexts such as
 	|/|, |?|, |:s|, |:g|, |:v|, and |:vim|.  To insert a literal <Tab>
 	instead of triggering completion, type <C-V><Tab> or "\t".
+	See also |'wildoptions'|.
 	NOTE: This option is set to the Vi default value when 'compatible' is
 	set and to the Vim default value when 'compatible' is reset.
 
@@ -9926,6 +9927,20 @@
 	A list of words that change how |cmdline-completion| is done.
 
 	The following values are supported:
+	  exacttext	When this flag is present, search pattern completion
+			(e.g., in |/|, |?|, |:s|, |:g|, |:v|, and |:vim|)
+			shows exact buffer text as menu items, without
+			preserving regex artifacts like position
+			anchors (e.g., |/\<|).  This provides more intuitive
+			menu items that match the actual buffer text.
+			However, searches may be less accurate since the
+			pattern is not preserved exactly.
+			By default, Vim preserves the typed pattern (with
+			anchors) and appends the matched word.  This preserves
+			search correctness, especially when using regular
+			expressions or with 'smartcase' enabled.  However, the
+			case of the appended matched word may not exactly
+			match the case of the word in the buffer.
 	  fuzzy		Use |fuzzy-matching| to find completion matches. When
 			this value is specified, wildcard expansion will not
 			be used for completion.  The matches will be sorted by