Cleanup (#600)

* General Code Cleanup
 * Add check for TABs to check_style_guide.py
 * Removing warnings

modules/sync/syncs/urlsynchronization.cpp

@@ -203,7 +203,7 @@ void UrlSynchronization::start() {
                 // If we are forcing the override, we download to a temporary file first,
                 // so when we are done here, we need to rename the file to the original
                 // name
-                
+
                 const std::string& tempName = d->destination();
                 std::string originalName = tempName.substr(
                     0,