remove extra whitespace

Author: vladak

network.tex

@@ -101,7 +101,7 @@
 interface, not a computer
 \item \emsl{port} -- 2 bytes, application end-points on a host
 \item \emsl{DNS (Domain Name System)} --  translates domain names to the
-numerical IP addresses 
+numerical IP addresses
 \end{itemize}
 \end{slide}