Rob W. W. Hooft's spelling fixes for the Library Reference. I hope
SourceForge doesn't choke on this batch :-)

I'm not entirely sure this is 100% correct. The patch changes an
\index{persistency} to \index{presistence}, and I don't know what \index{}
does. But it seems to do so persi--er, consistently, so I hope it isn't a
problem.
diff --git a/Doc/lib/libsignal.tex b/Doc/lib/libsignal.tex
index f2624e6..ce23da1 100644
--- a/Doc/lib/libsignal.tex
+++ b/Doc/lib/libsignal.tex
@@ -56,7 +56,7 @@
 will be the only one to receive signals (this is enforced by the
 Python \module{signal} module, even if the underlying thread
 implementation supports sending signals to individual threads).  This
-means that signals can't be used as a means of interthread
+means that signals can't be used as a means of inter-thread
 communication.  Use locks instead.
 
 \end{itemize}