diff --git a/lib/matplotlib/animation.py b/lib/matplotlib/animation.py
index 0009706a8d05..3909b462e431 100644
--- a/lib/matplotlib/animation.py
+++ b/lib/matplotlib/animation.py
@@ -1814,7 +1814,7 @@ def _draw_frame(self, framedata):
         self._drawn_artists = self._func(framedata, *self._args)
         if self._blit:
             if self._drawn_artists is None:
-                    raise RuntimeError('The animation function must return a '
-                                       'sequence of Artist objects.')
+                raise RuntimeError('The animation function must return a '
+                                   'sequence of Artist objects.')
             for a in self._drawn_artists:
                 a.set_animated(self._blit)
diff --git a/lib/matplotlib/lines.py b/lib/matplotlib/lines.py
index 057a03291a25..4fcbb1bf382f 100644
--- a/lib/matplotlib/lines.py
+++ b/lib/matplotlib/lines.py
@@ -877,7 +877,7 @@ def get_markeredgecolor(self):
                 if self._marker.get_marker() in ('.', ','):
                     return self._color
                 if self._marker.is_filled() and self.get_fillstyle() != 'none':
-                     return 'k'  # Bad hard-wired default...
+                    return 'k'  # Bad hard-wired default...
             return self._color
         else:
             return mec
diff --git a/lib/mpl_toolkits/exceltools.py b/lib/mpl_toolkits/exceltools.py
index 2fae5b273004..22aaef6762dc 100644
--- a/lib/mpl_toolkits/exceltools.py
+++ b/lib/mpl_toolkits/exceltools.py
@@ -55,9 +55,9 @@ def xlformat_factory(format):
 
     xlstyle = excel.XFStyle()
     if isinstance(format, mlab.FormatPercent):
-       zeros = ''.join(['0']*format.precision)
-       xlstyle.num_format_str = '0.%s%%;[RED]-0.%s%%'%(zeros, zeros)
-       format.scale = 1.
+        zeros = ''.join(['0']*format.precision)
+        xlstyle.num_format_str = '0.%s%%;[RED]-0.%s%%'%(zeros, zeros)
+        format.scale = 1.
     elif isinstance(format, mlab.FormatFloat):
         if format.precision>0:
             zeros = ''.join(['0']*format.precision)