Fix flake8 issues pandas-dev#24235

Author: aqurilla

doc/source/whatsnew/v0.17.0.rst

@@ -174,7 +174,7 @@ As a result of this change, these methods are now all discoverable via tab-compl
 .. ipython::
     :verbatim:
 
-    In [15]: df.plot.<TAB>
+    In [15]: df.plot.<TAB>  # noqa: E225, E999
     df.plot.area     df.plot.barh     df.plot.density  df.plot.hist     df.plot.line     df.plot.scatter
     df.plot.bar      df.plot.box      df.plot.hexbin   df.plot.kde      df.plot.pie
 
@@ -747,14 +747,14 @@ Previous Behavior:
 
 .. code-block:: ipython
 
-   In [5]: s == None
+   In [5]: s == None  # noqa: E711
    TypeError: Could not compare <type 'NoneType'> type with Series
 
 New Behavior:
 
 .. ipython:: python
 
-   s == None
+   s == None  # noqa: E711
 
 Usually you simply want to know which values are null.
 
@@ -769,7 +769,7 @@ Usually you simply want to know which values are null.
 
    .. ipython:: python
 
-      None == None
+      None == None  # noqa: E711
       np.nan == np.nan
 
 .. _whatsnew_0170.api_breaking.hdf_dropna:

doc/source/whatsnew/v0.17.1.rst

@@ -84,7 +84,7 @@ Enhancements
 
   .. ipython:: python
 
-     df = DataFrame({'A': ['foo'] * 1000})
+     df = DataFrame({'A': ['foo'] * 1000})  # noqa: F821
      df['B'] = df['A'].astype('category')
 
      # shows the '+' as we have object dtypes

setup.cfg

@@ -48,8 +48,6 @@ exclude =
     doc/source/whatsnew/v0.15.0.rst
     doc/source/whatsnew/v0.15.1.rst
     doc/source/whatsnew/v0.15.2.rst
-    doc/source/whatsnew/v0.17.0.rst
-    doc/source/whatsnew/v0.17.1.rst
     doc/source/basics.rst
     doc/source/contributing_docstring.rst
     doc/source/enhancingperf.rst