Commit: runtime(doc): update description of :uniq command

[Christian Brabandt]

runtime(doc): update description of :uniq command

Commit: https://github.com/vim/vim/commit/1c471ac548cc883fdd5446c62a4b90cdcb6769ee
Author: zeertzjq <zeer...@outlook.com>
Date: Wed Jun 25 21:07:25 2025 +0200

runtime(doc): update description of :uniq command

The examples mention the [u] flag, so at least the [u] flag should be
introduced before the examples.

Slightly reword the sentence about trailing/leading white space.

closes: #17604

Co-authored-by: Hirohito Higashi <h.eas...@gmail.com>
Signed-off-by: zeertzjq <zeer...@outlook.com>
Signed-off-by: Hirohito Higashi <h.eas...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/doc/change.txt b/runtime/doc/change.txt
index 65e4e72cb..4bd877f9f 100644
--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -1,4 +1,4 @@
-*change.txt* For Vim version 9.1. Last change: 2025 Jun 23
+*change.txt* For Vim version 9.1. Last change: 2025 Jun 25


VIM REFERENCE MANUAL by Bram Moolenaar
@@ -2014,12 +2014,20 @@ Also see |:sort-uniq|.
With [r] comparison is done on the text that matches
/{pattern}/ instead of the full line.

+ With [u] only keep lines that do not repeat (i.e., are
+ not immediately followed by the same line).
+
+ With [!] only keep lines that are immediately followed
+ by a duplicate.
+
+ If both [!] and [u] are given, [u] is ignored and [!]
+ takes effect.
+
When /{pattern}/ is specified and [r] is not used, the
text matched with {pattern} is skipped and comparison
is done on what comes after the match.
'ignorecase' applies to the pattern, but 'smartcase'
is not used.
-
Instead of the slash any non-letter can be used.

For example, to remove adjacent duplicate lines based
@@ -2031,17 +2039,8 @@ Also see |:sort-uniq|.
< If {pattern} is empty (e.g. // is used), the last
search pattern is used.

- With [u] only keep lines that do not repeat (i.e., are
- not immediately followed by the same line).
-
- With [!] only keep lines that are immediately followed
- by a duplicate.
-
- If both [!] and [u] are given, [u] is ignored and [!]
- takes effect.
-
- Note that leading and trailing white space, and lines
- that are not adjacent, are not considered duplicates.
+ Note that leading and trailing white space may cause
+ lines to be considered different.
To remove all duplicates regardless of position, use
|:sort-u| or external tools.