Updated mediawiki/extensions
Project: mediawiki/extensions/TemplateSandbox  e79d5bb7c1e4a8736b4ca253212b8b5245434c5a
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Remove double space

1 sentence per line instead
Spotted by 아라는 다 알아
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Templatesandbox-text/en_(3)

Change-Id: I982ddba02a981953f1ac375d68682d9d0889d7d8