Changeset [6d6bcf8471b87c602093ab4061b49352e4efdd2b] by Egor Lynko

Make errors more inspectable by settings message

When message is set as variable, instead of redefining message
method, the message will be used in inspect and to_s calls,
both implicit and explicit, which improves logs readability and
simmplifies debugging in the irb
https://github.com/aasm/aasm/commit/6d6bcf8471b87c602093ab4061b4935...