Fix typo

Examples/UNO_rf95_server/UNO_rf95_server.ino

@@ -1,6 +1,6 @@
 // rf95_server.pde
 // -*- mode: C++ -*-
-// Example sketch showing how to create a simple messageing server
+// Example sketch showing how to create a simple messaging server
 // with the RH_RF95 class. RH_RF95 class does not provide for addressing or
 // reliability, so you should only use RH_RF95  if you do not need the higher
 // level messaging abilities.
@@ -82,5 +82,3 @@ void loop()
       }
     }
 }
-
-