6669: Descriptions for file formats into Export dialog are ignored by the translation

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22103 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
typo

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22104 4ae1f11a-8b86-4847-b8af-ab372f36d1fd