New Sphinx version (or docutils) has slightly changed the output format
for code documentation directives. These changes try to mimic previous
behavior, even though it does not achieve 100% equal result. In some
cases the new default style does not require further tweaks, and in some
others styling as before is not possible.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>