docstring fix for pandas.DataFrame.ffill

Author: shriyakalakata

ci/code_checks.sh

@@ -899,7 +899,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         pandas.DataFrame.copy\
         pandas.DataFrame.droplevel\
         pandas.DataFrame.dtypes\
-        pandas.DataFrame.ffill\
         pandas.DataFrame.first_valid_index\
         pandas.DataFrame.get\
         pandas.DataFrame.keys\

pandas/core/generic.py

@@ -7139,6 +7139,11 @@ def ffill(
         {klass} or None
             Object with missing values filled or None if ``inplace=True``.
 
+        See Also
+        -------
+        DataFrame.bfill : Fill NA/NaN values by using the next valid observation
+            to fill the gap.
+
         Examples
         --------
         >>> df = pd.DataFrame(