Add returns section

Author: ryankarlos

pandas/core/frame.py

@@ -1909,6 +1909,10 @@ def to_stata(self, fname, convert_dates=None, write_index=True,
 
             .. versionadded:: 0.23.0
 
+        Returns
+        ------
+        Stata (dta) file or StataWriter.
+
         Raises
         ------
         NotImplementedError
@@ -1921,7 +1925,7 @@ def to_stata(self, fname, convert_dates=None, write_index=True,
             * Categorical label contains more than 32,000 characters
 
             .. versionadded:: 0.19.0
-
+            
         See Also
         --------
         read_stata : Import Stata data files.