nits

www/tutorial/tutorial.html

@@ -82,7 +82,7 @@ getting an Emulab account, go to the <b><a href =
 <li> <a NAME="Designing"></a>
      <h3>Designing a Network Topology</h3>
 <p>
-The Testbed's power lies in its ability to assume many different
+Part of the Testbed's power lies in its ability to assume many different
 topologies; the description of a such a topology is a necessary part
 of an experiment.
 
@@ -171,7 +171,7 @@ going to node C:
 	tb-set-ip-interface $NodeB $NodeC 192.168.42.42	</code></pre>
 
 <p>
-Lastly, all NS files end with an epilog that instructs the simulator
+Lastly, all NS files end with an epilogue that instructs the simulator
 to start.
 
 	<code><pre>