test, provide regressions for short buffer bug

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, make output format buffer size slightly larger (4 times the previous size)

This is still suboptimal, we'd need something that's static but if
for some reason we realise it won't suffice we must have the possibility
to extend the buffer, or use dynamically alloc'd space or the like.

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'fix/ofmt-buffer-shortage' into next

* fix/ofmt-buffer-shortage:
  fix, make output format buffer size slightly larger (4 times the previous size)
  test, provide regressions for short buffer bug