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ee44d57525
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>