fix broken tag

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50299 91177308-0d34-0410-b5e6-96231b3b80d8

www/CheckerNotes.html

@@ -158,7 +158,7 @@ browser to view the bug reports.
 
 <p>
 Where the HTML files are generated is specified with a <b>-o</b> option to
-<ttscan-build</tt>. If <b>-o</b> isn't specified, a directory in <tt>/tmp</tt>
+<tt>scan-build</tt>. If <b>-o</b> isn't specified, a directory in <tt>/tmp</tt>
 is created to store the files (<tt>scan-build</tt> will print a message telling
 you where they are). If you want to view the reports immediately after the build
 completes, pass <b>-V</b> to <tt>scan-build</tt>.