I had initial go at cleaning safety attributes :
https://github.com/Dicebot/phobos/tree/logger-fix-trust
It still needs one druntime PR merged
(https://github.com/D-Programming-Language/druntime/pull/1009) to
be done properly but should be ready for destruction.
David snipet results in this after all changes:
std/experimental/logger/core.d(1675): Error: safe function
'std.experimental.logger.core.Logger.logf!(11, "aaa.d",
"aaa.main", "void aaa.main() @safe", "aaa", Dangerous).logf'
cannot call system function 'std.format.formattedWrite!(MsgRange,
char, Dangerous).formattedWrite'
