[vim/vim] 'isprint' is applied to the leading byte of a character (PR #21055)

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h_east

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Aug 15, 2026, 1:08:48 AM (yesterday) Aug 15

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Problem:  Excluding a value with 'isprint' also breaks the display of
          unrelated characters whose leading byte has that value.  After
          ":set isprint+=^226" the character U+222B is displayed as "<".
Solution: Apply 'isprint' to the character value only, not to the leading
          byte of its UTF-8 encoding.

fixes: #21053

You can view, comment on, or merge this pull request online at:

https://github.com/vim/vim/pull/21055

Commit Summary

a743897 'isprint' is applied to the leading byte of a character

File Changes

(2 files)

M src/drawline.c (5)
M src/testdir/test_utf8.vim (17)

Patch Links:

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