Fix a typo

llvm-svn: 28627

llvm/docs/TestingGuide.html

@@ -565,7 +565,7 @@ programs don't break as well as keep track of LLVM's progress over time.</p>
 
 <p>If you'd like to set up an instance of the nightly tester to run on your
 machine, take a look at the comments at the top of the
-<tt>utils/NightlyTester.pl</tt> file.  We usually run it from a crontab entry
+<tt>utils/NightlyTest.pl</tt> file.  We usually run it from a crontab entry
 that looks like this:</p>
 
 <div class="doc_code">