When referring to namespaces, always say "namespaces" instead of
"name spaces".

Inconsistency noted by Keith Briggs <keith.briggs@bt.com>.
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index e6203f6..cb5acde 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -227,7 +227,7 @@
   The arguments are a file name and two optional dictionaries.  The
   file is parsed and evaluated as a sequence of Python statements
   (similarly to a module) using the \var{globals} and \var{locals}
-  dictionaries as global and local name space.  If the \var{locals}
+  dictionaries as global and local namespace.  If the \var{locals}
   dictionary is omitted it defaults to the \var{globals} dictionary.
   If both dictionaries are omitted, the expression is executed in the
   environment where \function{execfile()} is called.  The return value is