Improve glossary entry for ABCs.
- Rename reST target name for collections ABCs to avoid collisions
- Link to glossary entry from numbers module doc (other modules already do it)
diff --git a/Doc/library/numbers.rst b/Doc/library/numbers.rst
index a0a825f..f46e8ac 100644
--- a/Doc/library/numbers.rst
+++ b/Doc/library/numbers.rst
@@ -7,9 +7,9 @@
.. versionadded:: 2.6
-The :mod:`numbers` module (:pep:`3141`) defines a hierarchy of numeric abstract
-base classes which progressively define more operations. None of the types
-defined in this module can be instantiated.
+The :mod:`numbers` module (:pep:`3141`) defines a hierarchy of numeric
+:term:`abstract base classes <abstract base class>` which progressively define
+more operations. None of the types defined in this module can be instantiated.
.. class:: Number