runtime(doc): 'ignorecase' affects character classes in the old engine

fixes: #19230

Signed-off-by: Christian Brabandt <cb@256bit.org>

diff --git a/runtime/doc/pattern.txt b/runtime/doc/pattern.txt
index 6cafb688a7bfb033d5db932bee2b1fd732cbe64b..8e33685181b776c3dce8e4e1aaa1bc41899a82b9 100644 (file)
--- a/runtime/doc/pattern.txt
+++ b/runtime/doc/pattern.txt
@@ -1,4 +1,4 @@
-*pattern.txt*  For Vim version 9.1.  Last change: 2025 Nov 09
+*pattern.txt*  For Vim version 9.1.  Last change: 2026 Jan 28
 
 
                  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1169,13 +1169,15 @@ x       A single character, with no special meaning, matches itself
 *[:graph:]*      [:graph:]   isgraph   ASCII printable characters excluding
                                        space
 *[:lower:]*      [:lower:]   (1)       lowercase letters (all letters when
-                                       'ignorecase' is used)
+                                       'ignorecase' is used and the old
+                                       engine is in use |two-engines|)
 *[:print:]*      [:print:]   (2)       printable characters including space
 *[:punct:]*      [:punct:]   ispunct   ASCII punctuation characters
 *[:space:]*      [:space:]             whitespace characters: space, tab, CR,
                                        NL, vertical tab, form feed
 *[:upper:]*      [:upper:]   (3)       uppercase letters (all letters when
-                                       'ignorecase' is used)
+                                       'ignorecase' is used and the old
+                                       engine is in use |two-engines|)
 *[:xdigit:]*     [:xdigit:]            hexadecimal digits: 0-9, a-f, A-F
 *[:return:]*     [:return:]            the <CR> character
 *[:tab:]*        [:tab:]               the <Tab> character