Cleanup handle_runtest_command:

- Make command argument require exactly one argument; do not allow extras.
- Remove superfluous whitespace at end of function.
- Wrap function arguments to fit in 80 columns.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2115 b42882b7-edfa-0310-969c-e2dbd0fdcd60