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whitespace: support multiline statusline for warnings

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Add a new airline_section_warning2 that displays whitespace warnings on
a second statusline line when Vim supports the statuslineopt option
(Vim 9.2.0083+) and g:airline_multiline is set. The second line only
appears when there are actual whitespace issues, avoiding an empty
second line when the buffer is clean.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christian Brabandt
2026-04-12 08:15:15 +00:00
co-authored by Claude Opus 4.6
parent 7fe264257e
commit ee44d57525
7 changed files with 77 additions and 16 deletions
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autoload/airline.vim
+1 -1
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@@ -6,7 +6,7 @@ scriptencoding utf-8
let g:airline_statusline_funcrefs = get(g:, 'airline_statusline_funcrefs', [])
let g:airline_inactive_funcrefs = get(g:, 'airline_inactive_statusline_funcrefs', [])
let s:sections = ['a','b','c','gutter','x','y','z', 'error', 'warning']
let s:sections = ['a','b','c','gutter','x','y','z', 'error', 'warning', 'warning2']
let s:contexts = {}
let s:core_funcrefs = [
\ function('airline#extensions#apply'),