add one last TODO list item

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3838 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

TODO

@@ -21,6 +21,7 @@ For the next version:
   prompt.
 - Handle window resizes better.  After we resize, we should stay
   wherever we were before we resized, as Pico does.
+- Fix problems with color syntaxes' highlighting lines too aggressively.
 - Allow color syntaxes to apply to more than just color, so that we can
   e.g. specify a different alternate spell checker depending on which
   file type we have open.