@journals.over('<STR_LIT>', '<STR_LIT>')<EOL>def short_title(self, key, value):
short_title = value.get('<STR_LIT:a>')<EOL>title_variants = self.get('<STR_LIT>', [])<EOL>if value.get('<STR_LIT:u>'):<EOL><INDENT>short_title = value.get('<STR_LIT:u>')<EOL>title_variants.append(value.get('<STR_LIT:a>'))<EOL><DEDENT>self['<STR_LIT>'] = title_variants<EOL>return short_title<EOL>
Populate the ``short_title`` key.

    Also populates the ``title_variants`` key through side effects.