Comment on "opts.merge" in _run_with_profiler

IPython/core/magics/execution.py

@@ -198,6 +198,7 b' python-profiler package from non-free.""")'
 
         """
 
+        # Fill default values for unspecified options:
         opts.merge(Struct(D=[''], l=[], s=['time'], T=['']))
 
         prof = profile.Profile()