Merge branch 'js/range-diff-noprefix'

"git range-diff" segfaulted when diff.noprefix configuration was used, as it blindly expected the patch it internally generates to have the standard a/ and b/ prefixes. The command now forces the internal patch to be built without any prefix, not to be affected by any end-user configuration. * js/range-diff-noprefix: range-diff: internally force `diff.noprefix=true`