Native sim test output wraps lines at 256 chars

[bryceschober]

The Zephyr unit test output gets forced to wrap at 256 characters, and that is getting in the way of some custom printing that I'm doing on test assertion failure, as in:

    zassert_mem_equal(expected_buf, actual_buf, sizeof(expected_buf),
        my_fancy_memory_buffer_formatter(expected_buf, actual_buf).c_str());

FWIW, I ran the executable under the debugger, and I was able to trace execution down into cbvprintf_package() in lib/os/cbprintf_packaged.c, with a fully intact string of about 1800 characters, but then the path of execution got confusing, and I gave up.

How would I find where this force line-wrapping output behavior is implemented, and how might I adjust it?

Originally posted by @bryceschober in #96173