add reference to `%config InlineBackend` in %pylab docstring

also cleaned up %config and %pylab docstrings to be a little more sphinx-autogen friendly.

IPython/core/magic.py

@@ -3455,6 +3455,17 b' Defaulting color scheme to \'NoColor\'"""'
         It will import at the top level numpy as np, pyplot as plt, matplotlib,
         pylab and mlab, as well as all names from numpy and pylab.
 
+        If you are using the inline matplotlib backend for embedded figures,
+        you can adjust its behavior via the %config magic::
+
+            # enable SVG figures, necessary for SVG+XHTML export in the qtconsole
+            In [1]: %config InlineBackend.figure_format = 'svg'
+            
+            # change the behavior of closing all figures at the end of each
+            # execution (cell), or allowing reuse of active figures across
+            # cells:
+            In [2]: %config InlineBackend.close_figures = False
+
         Parameters
         ----------
         guiname : optional
@@ -3465,14 +3476,16 b' Defaulting color scheme to \'NoColor\'"""'
 
         Examples
         --------
-        In this case, where the MPL default is TkAgg:
+        In this case, where the MPL default is TkAgg::
+
         In [2]: %pylab
 
         Welcome to pylab, a matplotlib-based Python environment.
         Backend in use: TkAgg
         For more information, type 'help(pylab)'.
 
-        But you can explicitly request a different backend:
+        But you can explicitly request a different backend::
+
         In [3]: %pylab qt
 
         Welcome to pylab, a matplotlib-based Python environment.
@@ -3614,13 +3627,11 b' Defaulting color scheme to \'NoColor\'"""'
     def magic_config(self, s):
         """configure IPython
         
-        %config Class.trait=value
-        or
-        %config Class
+            %config Class[.trait=value]
         
         This magic exposes most of the IPython config system. Any
         Configurable class should be able to be configured with the simple
-        line:
+        line::
         
             %config Class.trait=value
         
@@ -3630,7 +3641,8 b' Defaulting color scheme to \'NoColor\'"""'
         Examples
         --------
         
-        To see what classes are availabe for config, pass no arguments:
+        To see what classes are availabe for config, pass no arguments::
+
         In [1]: %config
         Available objects for config:
             TerminalInteractiveShell
@@ -3640,7 +3652,8 b' Defaulting color scheme to \'NoColor\'"""'
             IPCompleter
             DisplayFormatter
         
-        # To view what is configurable on a given class, just pass the class name
+        To view what is configurable on a given class, just pass the class name::
+
         In [2]: %config IPCompleter
         IPCompleter options
         -----------------
@@ -3650,10 +3663,12 b' Defaulting color scheme to \'NoColor\'"""'
             This will enable completion on elements of lists, results of function calls,
             etc., but can be unsafe because the code is actually evaluated on TAB.
         
-        # but the real use is in setting values:
+        but the real use is in setting values::
+
         In [3]: %config IPCompleter.greedy = True
         
-        # and these values are read from the user_ns if they are variables:
+        and these values are read from the user_ns if they are variables::
+
         In [4]: feeling_greedy=False
         
         In [5]: %config IPCompleter.greedy = feeling_greedy