Commit: runtime(doc): improve preinserted() doc

[Christian Brabandt]

runtime(doc): improve preinserted() doc

Commit: https://github.com/vim/vim/commit/4edaf8923335504c31810dc4c5213eaba84e7898
Author: zeertzjq <zeer...@outlook.com>
Date: Sat Sep 27 12:17:09 2025 +0000

runtime(doc): improve preinserted() doc

Change the second "if" to "because", otherwise it may be misinterpreted
that preinserted() can return non-zero just because these options are
set.

closes: #18409

Signed-off-by: zeertzjq <zeer...@outlook.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 0a73928e9..409588b2b 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt* For Vim version 9.1. Last change: 2025 Sep 26
+*builtin.txt* For Vim version 9.1. Last change: 2025 Sep 27


VIM REFERENCE MANUAL by Bram Moolenaar
@@ -8036,9 +8036,9 @@ pow({x}, {y}) *pow()*

preinserted() *preinserted()*
Returns non-zero if text has been inserted after the cursor
- because "preinsert" is present in 'completeopt', or if
+ because "preinsert" is present in 'completeopt', or because
"longest" is present in 'completeopt' while 'autocomplete'
- is enabled. Otherwise returns zero.
+ is active. Otherwise returns zero.

Return type: |Number|