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814e8828b5
Non-ASCII chars in tables (.TS ... .TE) result in warnings:
man --warnings po4a/man/uk/xz.1 > /dev/null
troff:<standard input>:464: warning: special character 'u0411\[tbl' not defined
troff:<standard input>:1157: warning: special character 'u044\[tbl' not defined
troff:<standard input>:1682: warning: special character 'u0434\[tbl' not defined
po4a generates groff Unicode escapes like '\u0435' followed immediately
by '[' in table contexts, causing groff to interpret the full string
'u0435[tbl' as a single special character name. Fix this by inserting
a dummy character (\&) after every Unicode escape so that the bracket
is treated as literal text instead of part of the character name.
Co-authored-by: Otto Kekäläinen <otto@debian.org>
Partially-fixes: https://github.com/tukaani-project/xz/pull/220