Minor markup tweak.
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 2f9a831..0bb22aa 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -1507,7 +1507,7 @@
    use :func:`importlib.import_module`.
 
    .. versionchanged:: 3.3
-      Negative values for 'level' are no longer supported.
+      Negative values for *level* are no longer supported.
 
 
 .. rubric:: Footnotes