Fix of Flake8 errors.

Author: benjaminr

pandas/core/frame.py

@@ -6056,7 +6056,7 @@ def _gotitem(self,
     core.window.Rolling : Perform operations over rolling window.
     core.window.Expanding : Perform operations over expanding window.
     core.window.EWM : Perform operation over exponential weighted window.
-    
+
     Notes
     -----
     `agg` is an alias for `aggregate`. Use the alias.

pandas/core/groupby/generic.py

@@ -1256,7 +1256,7 @@ class DataFrameGroupBy(NDFrameGroupBy):
     DataFrame.groupby.apply
     DataFrame.groupby.transform
     DataFrame.aggregate
-    
+
     Notes
     -----
     `agg` is an alias for `aggregate`. Use the alias.

pandas/core/groupby/groupby.py

@@ -2076,7 +2076,8 @@ def tail(self, n=5):
         Examples
         --------
 
-        >>> df = pd.DataFrame([['a', 1], ['a', 2], ['b', 1], ['b', 2]], columns=['A', 'B'])
+        >>> df = pd.DataFrame([['a', 1], ['a', 2], ['b', 1], ['b', 2]], \
+                              columns=['A', 'B'])
         >>> df.groupby('A').tail(1)
            A  B
         1  a  2

pandas/core/resample.py

@@ -217,7 +217,7 @@ def pipe(self, func, *args, **kwargs):
     DataFrame.groupby.aggregate
     DataFrame.resample.transform
     DataFrame.aggregate
-    
+
     Notes
     -----
     `agg` is an alias for `aggregate`. Use the alias.
@@ -226,7 +226,8 @@ def pipe(self, func, *args, **kwargs):
 
     Examples
     --------
-    >>> s = pd.Series([1, 2, 3, 4, 5], index=pd.date_range('20130101', periods=5, freq='s'))
+    >>> s = pd.Series([1, 2, 3, 4, 5], \
+                      index=pd.date_range('20130101', periods=5, freq='s'))
     2013-01-01 00:00:00    1
     2013-01-01 00:00:01    2
     2013-01-01 00:00:02    3

pandas/core/series.py

@@ -3281,7 +3281,7 @@ def _gotitem(self, key, ndim, subset=None):
     Series.apply : Invoke function on a Series.
     Series.transform : Transform function producing
         a Series with like indexes.
-    
+
     Notes
     -----
     `agg` is an alias for `aggregate`. Use the alias.

pandas/core/window.py

@@ -698,13 +698,13 @@ def f(arg, *args, **kwargs):
     --------
     pandas.DataFrame.rolling.aggregate
     pandas.DataFrame.aggregate
-    
+
     Notes
     -----
     `agg` is an alias for `aggregate`. Use the alias.
 
     A passed user-defined-function will be passed a Series for evaluation.
-    
+
     Examples
     --------
     >>> df = pd.DataFrame(np.random.randn(10, 3), columns=['A', 'B', 'C'])
@@ -1604,7 +1604,7 @@ def _validate_freq(self):
     --------
     Series.rolling
     DataFrame.rolling
-    
+
     Notes
     -----
     `agg` is an alias for `aggregate`. Use the alias.
@@ -1898,7 +1898,7 @@ def _get_window(self, other=None):
     DataFrame.expanding.aggregate
     DataFrame.rolling.aggregate
     DataFrame.aggregate
-    
+
     Notes
     -----
     `agg` is an alias for `aggregate`. Use the alias.
@@ -2208,7 +2208,7 @@ def _constructor(self):
     `agg` is an alias for `aggregate`. Use the alias.
 
     A passed user-defined-function will be passed a Series for evaluation.
-    
+
     Examples
     --------
     >>> df = pd.DataFrame(np.random.randn(10, 3), columns=['A', 'B', 'C'])