Clarify that copy_reg.pickle() is not intended for use with "classic" classes.
This was stated before, but a minor grammatical error made it difficult to be
sure of the meaning.
This closes SF bug #530143.
diff --git a/Doc/lib/libcopyreg.tex b/Doc/lib/libcopyreg.tex
index 25cc505..b2ea015 100644
--- a/Doc/lib/libcopyreg.tex
+++ b/Doc/lib/libcopyreg.tex
@@ -22,9 +22,11 @@
\begin{funcdesc}{pickle}{type, function\optional{, constructor}}
Declares that \var{function} should be used as a ``reduction''
- function for objects of type \var{type}; \var{type} should not a
- class object. \var{function} should return either a string or a
- tuple containing two or three elements.
+ function for objects of type \var{type}; \var{type} must not be a
+ ``classic'' class object. (Classic classes are handled differently;
+ see the documentation for the \refmodule{pickle} module for
+ details.) \var{function} should return either a string or a tuple
+ containing two or three elements.
The optional \var{constructor} parameter, if provided, is a
callable object which can be used to reconstruct the object when