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Fixes #79 "Optimization proposal for Cocaine::CommandLine::PosixRunner.available?".
You don't need this line. The ||= will take care of this for you.
It won't because it will reassign for false value.
You're right. Good call.
Don't require "posix/spawn" every time PosixRunner#available? is called
Prefer double-quoted strings unless you need single quotes to avoid extra backslashes for escaping.
@jyurek Is this pull ok for you or should I change something?
No, it's good. Sorry about the delay. Thanks a lot!