Remove double spaces

Spotted by Purodha Blissenbach
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Articlefeedbackv5-abusefilter-note-aftv5requestoversight/en
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Articlefeedbackv5-abusefilter-note-aftv5hide/en
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Articlefeedbackv5-abusefilter-note-aftv5flagabuse/en

Change-Id: I6296c9a9474030e95c22681adaad70bdd0810862