DOC: edits from review

Co-authored-by: Elliott Sales de Andrade <quantum.analyst@gmail.com>

tutorials/intermediate/blitting.py

@@ -5,7 +5,7 @@
 
 'Blitting' is a `standard technique
 <https://en.wikipedia.org/wiki/Bit_blit>`__ in computer graphics that
-in the context of matplotlib can be used to (drastically) improve
+in the context of Matplotlib can be used to (drastically) improve
 performance of interactive figures.  It is used internally by the
 :mod:`~.animation` and :mod:`~.widgets` modules for this reason.
 
@@ -17,7 +17,7 @@
 
 The procedure to save our work is roughly:
 
-- draw the figure, but exclude an artists marked as 'animated'
+- draw the figure, but exclude any artists marked as 'animated'
 - save a copy of the Agg RBGA buffer
 
 In the future, to update the 'animated' artists we
@@ -67,8 +67,8 @@
 
 
 ###############################################################################
-# This example works and shows a simple animation, however because we are only
-# grabbing the background once, if the size of dpi of the figure change, the
+# The previous example works and shows a simple animation, however because we are only
+# grabbing the background once, if the size or dpi of the figure change, the
 # background will be invalid and result in incorrect images.  There is also a
 # global variable and a fair amount of boiler plate which suggests we should
 # wrap this in a class.
@@ -107,8 +107,7 @@ def __init__(self, canvas, animated_artists):
         self.cid = canvas.mpl_connect('draw_event', self.on_draw)
 
     def on_draw(self, event):
-        """Callback to register with 'draw_event'
-        """
+        """Callback to register with 'draw_event'."""
         cv = self.canvas
         if event is not None:
             if event.canvas != cv:
@@ -117,7 +116,8 @@ def on_draw(self, event):
         self._draw_animated()
 
     def add_artist(self, art):
-        """Add a artist to be managed
+        """
+        Add an artist to be managed.
 
         Parameters
         ----------
@@ -132,15 +132,13 @@ def add_artist(self, art):
         self._artists.append(art)
 
     def _draw_animated(self):
-        """Draw all of the animated artists
-        """
+        """Draw all of the animated artists."""
         fig = self.canvas.figure
         for a in self._artists:
             fig.draw_artist(a)
 
     def update(self):
-        """Update the screen with animated artists
-        """
+        """Update the screen with animated artists."""
         cv = self.canvas
         fig = cv.figure
         # paranoia in case we missed the draw event,