summary: L10N messages hide clean-ness of workdir from 'hg summary'
'hg summary' recognizes workdir as clean by searching for 'clean' is
in own output text. But 'clean' is one of I18N target texts, so 'hg
summary --quiet' behaves incorrectly in non-English locale.
mercurial.el: add forgotten version number
The number was accidentally removed in the change from GPLv2 to GPLv2+
in
25e572394f5c.