#16 Improper highlight for C directives

[Radu Coravu]

Based on this issue here:
https://www.oxygenxml.com/forum/viewtopic.php?f=20&t=21197

If I have a snippet of C code:

#define VALUE1 100 /* Comment */
#define VALUE2 200 /* Comment */
#define VALUE3 300 /* Comment */

like the one above, for the first line of code the comment is recognized but not the "define" keyword, for the consecutive lines they are all rendered in pink and the comment is not recognized.

The easiest fix for this, which may not be correct would be that in the "c-hl.xml" to remove the highlighter which contains this comment:

and to add "define" as a keyword highlighter:

<highlighter type="keywords">
<style>directive</style>
<keyword>define</keyword>
</highlighter>