bpo-35054: Add yet more index entries for symbols. (GH-10121)

diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst
index f5a394a..3e0c995 100644
--- a/Doc/tutorial/introduction.rst
+++ b/Doc/tutorial/introduction.rst
@@ -11,7 +11,7 @@
 line by itself in an example means you must type a blank line; this is used to
 end a multi-line command.
 
-.. index:: single: #; comment
+.. index:: single: # (hash); comment
 
 Many of the examples in this manual, even those entered at the interactive
 prompt, include comments.  Comments in Python start with the hash character,