Initial documentation for the `abc` module.
diff --git a/Doc/library/python.rst b/Doc/library/python.rst
index 3b58eee..3384322 100644
--- a/Doc/library/python.rst
+++ b/Doc/library/python.rst
@@ -17,6 +17,7 @@
    __main__.rst
    warnings.rst
    contextlib.rst
+   abc.rst
    atexit.rst
    traceback.rst
    __future__.rst