runtime(doc): Remove trailing spaces (#14784)
Fix the issues introduced by #14770.
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index edc018f..1d06e75 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -8993,9 +8993,9 @@
The {special} argument adds additional escaping of keywords
used in Vim commands. When it is not omitted and a non-zero
- number or a non-empty String (|non-zero-arg|), then special
- items such as "!", "%", "#" and "<cword>" (as listed in
- |expand()|) will be preceded by a backslash.
+ number or a non-empty String (|non-zero-arg|), then special
+ items such as "!", "%", "#" and "<cword>" (as listed in
+ |expand()|) will be preceded by a backslash.
This backslash will be removed again by the |:!| command.
The "!" character will be escaped (again with a |non-zero-arg|