Author: tietew-mediazilla
Description:
Unicode Control Characters such as "RIGHT-TO-LEFT OVERRIDE" (U+202E)
or *all unprintable characters* should be restricted in title text.
A title including control characters breaks RC, history, contributions, etc.
A username including control characters breaks page text after the signature!
And they are hard to be linked.
... in Japanese Wikipedia, a username with U+202E is used as vandalism.
Version: unspecified
Severity: normal