Declare source_match to be a pure function.
Declare source_match to be a pure function.

Gwendocg/babeldToS,Gwendocg/babeldToS,Drooids/babeld,wlanslovenija/babeld,jech/babeld,dtaht/babeld-shortrtt-metrics,woniullb/babeld,sudomesh/babeld,jech/babeld,wlanslovenija/babeld,boutier/babeld,tcatm/babeld