Changing the issue title with "~label" shows additional curly brackets in activity feed
Summary
Activity feed shows {
}
-
+
when updating an issue title that contains a label "~label".
Steps to reproduce
Rename an issue title.
Example Project
https://gitlab.com/gitlab-org/quality/team-tasks/issues/115#note_163626745
What is the current bug behavior?
Additional characters like {
}
+
-
are shown in the activity feed
What is the expected correct behavior?
Just the old and new title are present
Relevant logs and/or screenshots
Output of checks
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