Fix markup.

Doc/tutorial/datastructures.rst

@@ -365,9 +365,9 @@ with no duplicate elements.  Basic uses include membership testing and
 eliminating duplicate entries.  Set objects also support mathematical operations
 like union, intersection, difference, and symmetric difference.
 
-Curly braces or the :func:`set` function can be use to create sets. Note:
-To create an empty set you have to use set(), not {}; the latter creates
-an empty dictionary, a data structure that we discuss in the next section.
+Curly braces or the :func:`set` function can be use to create sets. Note: To
+create an empty set you have to use ``set()``, not ``{}``; the latter creates an
+empty dictionary, a data structure that we discuss in the next section.
 
 Here is a brief demonstration::