extdiff: prevent exception on double-translation
The docstring is translated twice: once when used as a format string,
and once on display. The second translation fails when the first
translation introduces non-ASCII characters in the string.
The problem is that the gettext module calls unicode(message) on the
string, i.e., it decodes it to a Unicode string using the ASCII
encoding (the default encoding). By translating it into a Unicode
string here, the unicode() call becomes a noop.
#!/bin/sh
#
hg init foo
cd foo
touch a
unset HGUSER
echo "[ui]" >> .hg/hgrc
echo "username= foo" >> .hg/hgrc
echo " bar1" >> .hg/hgrc
hg ci -Am m
rm .hg/hgrc
HGUSER=`(echo foo; echo bar2)` hg ci -Am m
hg ci -Am m -u "`(echo foo; echo bar3)`"
true