DOC: Refer to "kurt" consistently (rather than "kurtosis")

Author: toobaz

pandas/core/window.py

@@ -917,8 +917,8 @@ def skew(self, **kwargs):
     --------
     pandas.Series.%(name)s
     pandas.DataFrame.%(name)s
-    pandas.Series.kurtosis
-    pandas.DataFrame.kurtosis
+    pandas.Series.kurt
+    pandas.DataFrame.kurt
     scipy.stats.skew
     scipy.stats.kurtosis