Refine inline comments

Author: rayluo

msal_extensions/persistence.py

@@ -29,20 +29,19 @@
 def _mkdir_p(path):
     """Creates a directory, and any necessary parents.
 
-    This implementation based on a Stack Overflow question that can be found here:
-    https://stackoverflow.com/questions/600268/mkdir-p-functionality-in-python
-
     If the path provided is an existing file, this function raises an exception.
     :param path: The directory name that should be created.
     """
     if not path:
         return  # NO-OP
 
     if sys.version_info >= (3, 2):
-        # Can just use the standard Python functionality if it's recent enough (and the
-        # manual handling below can be dropped altogether when Python 2 support goes)
-        return os.makedirs(path, exist_ok=True)
+        os.makedirs(path, exist_ok=True)
+        return
 
+    # This fallback implementation is based on a Stack Overflow question:
+    # https://stackoverflow.com/questions/600268/mkdir-p-functionality-in-python
+    # Known issue: it won't work when the path is a root folder like "C:\\"
     try:
         os.makedirs(path)
     except OSError as exp: