parallel_parse: Typo in usage.

parallel_parse.sh

@@ -8,7 +8,7 @@ usage() {
   echo "Example: parsing any number of log files with up to 4"
   echo "processes in parallel with locally built pypy:"
   echo "  $ mkdir state"
-  echo "  $ $0 4 state out.tml /usr/local/bin/pypy \\"
+  echo "  $ $0 4 state out.html /usr/local/bin/pypy \\"
   echo "    bin/apachedex --period week"
 }