Missing period

Author: WillAyd

pandas/core/generic.py

@@ -6561,7 +6561,7 @@ def clip_upper(self, threshold, axis=None, inplace=False):
         axis : int or string axis name, optional
             Align object with threshold along the given axis.
         inplace : boolean, default False
-            Whether to perform the operation in place on the data
+            Whether to perform the operation in place on the data.
 
             .. versionadded:: 0.21.0