Address substantially all of Eric Snow's comments in issue #15295, except for
those which now have additional XXX's here.  I'll get to those later. :)
diff --git a/Doc/glossary.rst b/Doc/glossary.rst
index 809be6f..5eaefd5 100644
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -475,7 +475,7 @@
 
    module
       An object that serves as an organizational unit of Python code.  Modules
-      have a namespace contain arbitrary Python objects.  Modules are loaded
+      have a namespace containing arbitrary Python objects.  Modules are loaded
       into Python by the process of :term:`importing`.
 
    MRO