Add a note about how PEPs should really be more focussed, and contain

a single core idea.

pep-0001.txt

@@ -43,10 +43,16 @@ PEP Work Flow
     The PEP editor, Barry Warsaw <barry@zope.com>, assigns numbers
     for each PEP and changes its status.
 
-    The PEP process begins with a new idea for Python.  Each PEP must
-    have a champion -- someone who writes the PEP using the style and
-    format described below, shepherds the discussions in the
-    appropriate forums, and attempts to build community consensus
+    The PEP process begins with a new idea for Python.  It is highly
+    recommended that a single PEP contain a single key proposal or new
+    idea.  The more focussed the PEP, the more successfully it tends
+    to be.  The PEP editor reserves the right to reject PEP proposals
+    if they appear to unfocussed or too broad.  If in doubt, split
+    your PEP into several well-focussed ones.
+
+    Each PEP must have a champion -- someone who writes the PEP using
+    the style and format described below, shepherds the discussions in
+    the appropriate forums, and attempts to build community consensus
     around the idea.  The PEP champion (a.k.a. Author) should first
     attempt to ascertain whether the idea is PEP-able.  Small
     enhancements or patches often don't need a PEP and can be injected