Fix typo dans library/graphlib.po

Author: Jeff D

library/graphlib.po

@@ -170,8 +170,8 @@ msgid ""
 "Progress can be made if cycles do not block the resolution and either there "
 "are still nodes ready that haven't yet been returned by :meth:"
 "`TopologicalSorter.get_ready` or the number of nodes marked :meth:"
-"`TopologicalSorter.done` is less than the number that have been returned by :"
-"meth:`TopologicalSorter.get_ready`."
+"`TopologicalSorter.done` is less than the number that have been returned by "
+":meth:`TopologicalSorter.get_ready`."
 msgstr ""
 "Retourne ``True`` si des une progression peut être faite et ``False`` dans "
 "le cas contraire. La progression est possible si des circuits ne bloquent pas "