Alpine is running with Musl libc and musl uses extended precision
doubles, while valgrind can't handle extended precision,
2.3 == atof("2.3") won't be true under valgrind.
And therefore the option retrieval methods *_get_double would fail.
Also we have to increase the test verbosity, as `SKIPm` doesn't print
the message when skipping the tests.
See: silentbicycle/greatest#85
To assert static objects, we either have to add a method into the
object under test itself and recompile on a test run with the activated test
method (but also recompile after tests, so that method is gone on
release builds).
Alternatively we can include the whole .c file in our test
infrastructure and save the object in the test directory. So there's no
necessity to clean it up prior to a release build and it's contained
away.
This requires, that the test folder isn't excluded in coveralls.
Previously config lines like
[rule]
script = mail -s "New notif"
were only possible to get written with additional full quotes,
which makes no sense in command line expressions.
It's hard to trace back, which methods in option parser require freeing
the result and which prohibit it. Marking all non-freeable values as
const lets this problem solve the compiler.
