Add links from library/functions to other docs.
Suggested by Terry J. Reedy in #12298.
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index f5d7629..4ed3ec5 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -83,11 +83,12 @@
.. function:: bool([x])
- Convert a value to a Boolean, using the standard truth testing procedure. If
- *x* is false or omitted, this returns :const:`False`; otherwise it returns
- :const:`True`. :class:`bool` is also a class, which is a subclass of
- :class:`int`. Class :class:`bool` cannot be subclassed further. Its only
- instances are :const:`False` and :const:`True`.
+ Convert a value to a Boolean, using the standard :ref:`truth testing
+ procedure <truth>`. If *x* is false or omitted, this returns ``False``;
+ otherwise it returns ``True``. :class:`bool` is also a class, which is a
+ subclass of :class:`int` (see :ref:`typesnumeric`). Class :class:`bool`
+ cannot be subclassed further. Its only instances are ``False`` and
+ ``True`` (see :ref:`bltin-boolean-values`).
.. index:: pair: Boolean; type
@@ -1055,7 +1056,7 @@
Range objects implement the :class:`collections.Sequence` ABC, and provide
features such as containment tests, element index lookup, slicing and
- support for negative indices:
+ support for negative indices (see :ref:`typesseq`):
>>> r = range(0, 20, 2)
>>> r