glepnir 15d57ab0ba fix(api): single-line visual block insert triggers extra on_lines #35098 ...

Problem: Visual block insert on a single line incorrectly triggers two
on_lines callbacks - one for the correct line (0-indexed) and another
for a non-existent additional line.

Solution: Only call changed_lines() in block_insert() when additional
lines beyond the first were actually modified (start.lnum < end.lnum).

2025-07-29 06:24:44 -07:00

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