Missing space; reported by Robert Kern <kernr@ncifcrf.gov>.

Doc/lib/libasyncore.tex

@@ -16,7 +16,7 @@ socket service clients and servers.
 There are only two ways to have a program on a single processor do 
 ``more than one thing at a time.'' Multi-threaded programming is the 
 simplest and most popular way to do it, but there is another very 
-different technique, that lets youhave nearly all the advantages of 
+different technique, that lets you have nearly all the advantages of 
 multi-threading, without actually using multiple threads.  It's really 
 only practical if your program is largely I/O bound.  If your program 
 is CPU bound, then pre-emptive scheduled threads are probably what