Updated mediawiki/extensions
Project: mediawiki/extensions/WikimediaIncubator  6d36b012f80a48cea65779a34cd59b97916f5f80

Standardize "Error" messages

Changed a couple of messages to standardize the group. Changed:
- The punctuation from "!" to "."
- Bolded "Error:"

Change-Id: I17b531522e48a6ce1fbacc83d4417796db012825