Add more entries to the glossary.

Written by Jeff Wheeler for GHOP.
diff --git a/Doc/library/bdb.rst b/Doc/library/bdb.rst
index c44f9e3..a8a61f1 100644
--- a/Doc/library/bdb.rst
+++ b/Doc/library/bdb.rst
@@ -290,7 +290,7 @@
 
 
 The following two methods can be called by clients to use a debugger to debug a
-statement, given as a string.
+:term:`statement`, given as a string.
 
 .. method:: Bdb.run(cmd, [globals, [locals]])