It is a follow-up to https://github.com/jenkinsci/git-plugin/pull/484#discussion_r105220902

BuildData exposes public API for contributing remoteUrls as strings, but there is no trimming of incoming values.

> Similarity check for remote URL lists... We may also get false negative if values like "

{remoteUrl}" and " {remoteUrl}

" sneak into the set (due to the size check above). I would vote for explicit trimming of strings in places like https://github.com/stephenc/git-plugin/blob/b8f94dfed07e996e87dff4f27615bc82ff8103c3/src/main/java/hudson/plugins/git/util/BuildData.java#L77 and https://github.com/stephenc/git-plugin/blob/b8f94dfed07e996e87dff4f27615bc82ff8103c3/src/main/java/hudson/plugins/git/util/BuildData.java#L208 . Ant to the original code