Merge branch 'pw/unquote-path-in-git-pm' into maint

Code refactoring. * pw/unquote-path-in-git-pm: t9700: add tests for Git::unquote_path() Git::unquote_path(): throw an exception on bad path Git::unquote_path(): handle '\a' add -i: move unquote_path() to Git.pm