bpo-35054: Add more index entries for symbols. (GH-10064)
diff --git a/Doc/library/configparser.rst b/Doc/library/configparser.rst
index 47d6172..fcca97a 100644
--- a/Doc/library/configparser.rst
+++ b/Doc/library/configparser.rst
@@ -295,6 +295,8 @@
interpolation. This means values can be preprocessed before returning them
from ``get()`` calls.
+.. index:: single: %; interpolation in configuration files
+
.. class:: BasicInterpolation()
The default implementation used by :class:`ConfigParser`. It enables
@@ -323,6 +325,8 @@
``%(my_dir)s/Pictures`` as the value of ``my_pictures`` and
``%(home_dir)s/lumberjack`` as the value of ``my_dir``.
+.. index:: single: $; interpolation in configuration files
+
.. class:: ExtendedInterpolation()
An alternative handler for interpolation which implements a more advanced