Update runtime files
diff --git a/runtime/doc/change.txt b/runtime/doc/change.txt
index 62a69b7..1a9ba7a 100644
--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -1,4 +1,4 @@
-*change.txt* For Vim version 8.2. Last change: 2021 Jun 10
+*change.txt* For Vim version 8.2. Last change: 2021 Jun 23
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -780,12 +780,15 @@
"\/{string}/" and "\?{string}?" do the same as "//{string}/r".
"\&{string}&" does the same as "//{string}/".
*pattern-delimiter* *E146*
-Instead of the '/' which surrounds the pattern and replacement string, you
-can use any other single-byte character, but not an alphanumeric character,
-'\', '"' or '|'. This is useful if you want to include a '/' in the search
-pattern or replacement string. Example: >
+Instead of the '/' which surrounds the pattern and replacement string, you can
+use another single-byte character. This is useful if you want to include a
+'/' in the search pattern or replacement string. Example: >
:s+/+//+
+You can use most characters, but not an alphanumeric character, '\', '"' or
+'|'. In Vim9 script you should not use '#' because it may be recognized as
+the start of a comment.
+
For the definition of a pattern, see |pattern|. In Visual block mode, use
|/\%V| in the pattern to have the substitute work in the block only.
Otherwise it works on whole lines anyway.