In the "no extension" case, we weren't separating out the path and the original filename,
breaking the feature for languages where the word "copy" would be at the beginning of the
filename, not after it (e.g. "copia de foo" in Spanish, and similar in other romance
languages). This patch fixes that by separating the original path and filename in the no
extension case as is done for the other case, which should solve the issue.