Improve coverage on common/compat_libevent.c

The changes are in the branch "compat_libevent_tests"

https://github.com/twstrike/tor_for_patching/tree/compat_libevent_tests

Trac:
Username: rjunior

changed milestone to %Tor: 0.2.8.x-final

added 028-triaged component::core tor/tor milestone::Tor: 0.2.8.x-final points::small priority::medium reporter::rjunior resolution::implemented sponsor::S status::closed testing type::enhancement labels

Trac:
Username: rjunior
Status: new to needs_review

Trac:
Milestone: N/A to Tor: 0.2.8.x-final

Trac:
Keywords: N/A deleted, 028-triaged added

Trac:
Sponsor: N/A to SponsorS

mark these testing tickets in needs_review as 'small work remaining'

Trac:
Points: N/A to small

Merged with tweaks and cleanups.

(In the future, run "make check-spaces" to check space style.

Trac:
Resolution: N/A to implemented
Status: needs_review to closed

closed

moved to tpo/core/tor#17075 (closed)