Add missing quote

svn:r4232

contrib/osx/Tor

@@ -57,7 +57,7 @@ StopService ()
 RestartService () { StopService; StartService; }
 
 if [ "x$1" = x ]; then
-  echo "Syntax: tor {start|stop}
+  echo "Syntax: tor {start|stop}"
   exit 1
 fi