diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
index 9d711899876d..b02d979709ca 100644
--- a/lib/matplotlib/__init__.py
+++ b/lib/matplotlib/__init__.py
@@ -885,7 +885,8 @@ def __getitem__(self, key):
             key = alt
         return dict.__getitem__(self, key)
 
-    # http://stackoverflow.com/questions/2390827/how-to-properly-subclass-dict-and-override-get-set
+    # http://stackoverflow.com/questions/2390827
+    # (how-to-properly-subclass-dict-and-override-get-set)
     # the default dict `update` does not use __setitem__
     # so rcParams.update(...) (such as in seaborn) side-steps
     # all of the validation over-ride update to force
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
index 5304602699b0..e36c8947fa19 100644
--- a/lib/matplotlib/axis.py
+++ b/lib/matplotlib/axis.py
@@ -1003,9 +1003,9 @@ def _update_ticks(self, renderer):
                     ds1 = self._get_pixel_distance_along_axis(
                         interval_expanded[0], -0.5)
                 except:
-                    warnings.warn("Unable to find pixel distance along axis for\
-                    interval padding of ticks; assuming no interval padding\
-                    needed.")
+                    warnings.warn("Unable to find pixel distance along axis "
+                                  "for interval padding of ticks; assuming no "
+                                  "interval padding needed.")
                     ds1 = 0.0
                 if np.isnan(ds1):
                     ds1 = 0.0
@@ -1013,9 +1013,9 @@ def _update_ticks(self, renderer):
                     ds2 = self._get_pixel_distance_along_axis(
                         interval_expanded[1], +0.5)
                 except:
-                    warnings.warn("Unable to find pixel distance along axis for\
-                    interval padding of ticks; assuming no interval padding\
-                    needed.")
+                    warnings.warn("Unable to find pixel distance along axis "
+                                  "for interval padding of ticks; assuming no "
+                                  "interval padding needed.")
                     ds2 = 0.0
                 if np.isnan(ds2):
                     ds2 = 0.0
diff --git a/lib/mpl_toolkits/axes_grid1/anchored_artists.py b/lib/mpl_toolkits/axes_grid1/anchored_artists.py
index 1fa0effc4f74..bfcfeea344a7 100644
--- a/lib/mpl_toolkits/axes_grid1/anchored_artists.py
+++ b/lib/mpl_toolkits/axes_grid1/anchored_artists.py
@@ -119,7 +119,7 @@ def __init__(self, transform, size, label, loc,
 
         >>> import matplotlib.font_manager as fm
         >>> fontprops = fm.FontProperties(size=14, family='monospace')
-        >>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', 4, pad=0.5, sep=5, borderpad=0.5, frameon=False, size_vertical=0.5, color='white', fontproperties=fontprops)  # noqa
+        >>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', 4, pad=0.5, sep=5, borderpad=0.5, frameon=False, size_vertical=0.5, color='white', fontproperties=fontprops)
 
         """