Fix a few doc errors, mostly undefined keywords.
diff --git a/Doc/c-api/code.rst b/Doc/c-api/code.rst
index 7d9b4b6..52c4245 100644
--- a/Doc/c-api/code.rst
+++ b/Doc/c-api/code.rst
@@ -47,4 +47,4 @@
 
    Return a new empty code object with the specified filename,
    function name, and first line number.  It is illegal to
-   :keyword:`exec` or :func:`eval` the resulting code object.
+   :func:`exec` or :func:`eval` the resulting code object.