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f1cfd6f73f
Now the function utf8_char_size_screen can return -1 when the char is not printable. It has a specific behavior for some chars: - U+0009: value of option weechat.look.tab_width - U+0001 to U+001F (except U+0009): 1 - U+00AD (soft hyphen): -1 - U+200B (zero width space): -1