9e83f243e7
This bug happened when a unicode character was used for the delete sign.
Prior to this patch we used string subscripting which worked fine for
ASCII characters, but see yourself:
:echo '«5'[-2:]
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|---|---|---|
| .. | ||
| debug.vim | ||
| highlight.vim | ||
| jump.vim | ||
| repo.vim | ||
| sign.vim | ||
| util.vim | ||