Use correct markup in zipimport.rst. Patch by Sara Magliacane.

Doc/library/zipimport.rst

@@ -9,11 +9,11 @@
 This module adds the ability to import Python modules (:file:`\*.py`,
 :file:`\*.py[co]`) and packages from ZIP-format archives. It is usually not
 needed to use the :mod:`zipimport` module explicitly; it is automatically used
-by the built-in :keyword:`import` mechanism for ``sys.path`` items that are paths
+by the built-in :keyword:`import` mechanism for :data:`sys.path` items that are paths
 to ZIP archives.
 
-Typically, ``sys.path`` is a list of directory names as strings.  This module
-also allows an item of ``sys.path`` to be a string naming a ZIP file archive.
+Typically, :data:`sys.path` is a list of directory names as strings.  This module
+also allows an item of :data:`sys.path` to be a string naming a ZIP file archive.
 The ZIP archive can contain a subdirectory structure to support package imports,
 and a path within the archive can be specified to only import from a
 subdirectory.  For example, the path :file:`/tmp/example.zip/lib/` would only