Merge pull request #163 from pkalever/fix-fdopen

save_to_file: fix fd open mode

rtslib/root.py

@@ -479,7 +479,7 @@ def save_to_file(self, save_file=None, so_path=None):
         finally:
             os.umask(umask_original)
 
-        with os.fdopen(fdesc, 'w+') as f:
+        with os.fdopen(fdesc, 'w') as f:
             f.write(json.dumps(saveconf, sort_keys=True, indent=2))
             f.write("\n")
             f.flush()