Remove leading whitespace on Settings->Repository->Mirror Repository URL
Problem to solve
I accidentally included whitespace in front of the repository url, which caused it to error "invalid URL", without any further information.
Further details
(Include use cases, benefits, and/or goals)
Proposal
Whitespace should be stripped automatically or error reporting improved.
What does success look like, and how can we measure that?
(If no way to measure success, link to an issue that will implement a way to measure this)