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patch 9.0.2040: trim(): hard to use default mask

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Problem:  trim(): hard to use default mask
Solution: Use default 'mask' when it is v:none

The default 'mask' value is pretty complex, as it includes many
characters.  Yet, if one needs to specify the trimming direction, the
third argument, 'trim()' currently requires the 'mask' value to be
provided explicitly.

'v:none' is already used to mean "use the default argument value" in
user defined functions.  See |none-function_argument| in help.

closes: #13363

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Illia Bobyr <illia.bobyr@gmail.com>
This commit is contained in:
Illia Bobyr
2023-10-17 11:09:45 +02:00
committed by Christian Brabandt
parent 2e3cd52fa0
commit 6e6386716f
8 changed files with 59 additions and 20 deletions
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7
runtime/doc/builtin.txt
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@@ -10119,9 +10119,10 @@ trim({text} [, {mask} [, {dir}]]) *trim()*
Return {text} as a String where any character in {mask} is
removed from the beginning and/or end of {text}.
If {mask} is not given, {mask} is all characters up to 0x20,
which includes Tab, space, NL and CR, plus the non-breaking
space character 0xa0.
If {mask} is not given, or is |v:none| (see
|none-function_argument|), {mask} is all characters up to
0x20, which includes Tab, space, NL and CR, plus the
non-breaking space character 0xa0.
The optional {dir} argument specifies where to remove the
characters: