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[bug #57524] gpinyin: bad rendering for "ü" and "Ü" with tone marks


From: G. Branden Robinson
Subject: [bug #57524] gpinyin: bad rendering for "ü" and "Ü" with tone marks
Date: Mon, 10 May 2021 09:31:20 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0

Follow-up Comment #3, bug #57524 (project groff):


commit a475f646d1458025666ac8aeedbd43ddb2017635
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Mon May 10 06:55:55 2021 +1000

    [gpinyin]: Fix erroneous case folding of "Ü".
    
    * contrib/gpinyin/subs.pl (vowel_t): Fix incorrect rendering of base
      glyph 'U', which was being forced to lowercase when a dieresis and
      tone mark were both being applied.  This caused the tone mark to
      overlap the dieresis, so decrease the font size of the base glyph even
      more to compensate.  The result is ugly but comprehensible.
    
    See <https://savannah.gnu.org/bugs/?57524>, partially mitigated but not
    completely resolved.


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