Slip of the keyboard (f__ should be __).  Dunno why I had a totally
messed up (but not checked in) version in my work files and didn't
notice before releasing 1.5 -- at least the distributed latex file
doesn't have the bogus warning about changed __init__ semantics.
diff --git a/Doc/lib/libni.tex b/Doc/lib/libni.tex
index eecbe19..c564373 100644
--- a/Doc/lib/libni.tex
+++ b/Doc/lib/libni.tex
@@ -4,7 +4,7 @@
 
 \strong{Warning: This module is obsolete.}  As of Python 1.5a4,
 package support (with different semantics for \code{__init__} and no
-support for \code{__domain__} or\code{f__}) is built in the
+support for \code{__domain__} or\code{__}) is built in the
 interpreter.  The ni module is retained only for backward
 compatibility.