fix some formatting in rst file.

docs/source/whatsnew/pr/hist-range-glob-feature.rst

@@ -1,18 +1,25 b''
 History Range Glob feature
 ==========================
 
-Previously, when using ``%history`` users could specify either
+Previously, when using ``%history``, users could specify either
 a range of sessions and lines, for example:
 
-``~8/1-~6/5`` see history from the first line of 8 sessions ago,
-              to the fifth line of 6 sessions ago.
+.. code-block:: python
 
-Or users could specify ``-g <pattern>`` to glob ALL history for
-the specified pattern.
+   ~8/1-~6/5   # see history from the first line of 8 sessions ago,
+               # to the fifth line of 6 sessions ago.``
 
-However users could *not* specify both.
-If a user *did* specify both a range, and a glob pattern,
-then the glob pattern would be used *but the range would be ignored*.
+Or users could specify a glob pattern:
 
-With this enhancment, if a user specifies both a range and a glob pattern,
-the glob pattern will be applied to the specified range of history.
+.. code-block:: python
+
+   -g <pattern>  # glob ALL history for the specified pattern.
+
+However users could *not* specify both.  
+
+If a user *did* specify both a range and a glob pattern,
+then the glob pattern would be used (globbing *all* history) *and the range would be ignored*.
+
+---
+
+With this enhancment, if a user specifies both a range and a glob pattern, then the glob pattern will be applied to the specified range of history.