Fix mentioning when username starts with number
requested to merge github/fork/duduribeiro/fix_mentioning_username_beginning_with_number into master
Can't show this merge request because the source branch github/fork/duduribeiro/fix_mentioning_username_beginning_with_number is missing from project import-export-testing-group/gitlabhq_1662339666. Close this merge request or update the source branch.