Fix rescue_from documentation

[amacneil]

I'm not sure whether this is a bug or intentional, but right now rescue_from does not rescue subclasses by default.

This seems to be caused by https://github.com/intridea/grape/blob/master/lib/grape/api.rb#L217

handler_type = !!options[:rescue_subclasses] ? :rescue_handlers : :base_only_rescue_handlers

[dblock]

The documentation is certainly the intended behavior as discussed in #544. Are you sure that's not happening? Can you please write a test that reproduces the problem? /cc: @xevix

[xevix]

@dblock Confirmed. Adding a unit test to ensure the default is true, and fixing.

[xevix]

@adrianmacneil From what I can tell, handler_type is being assigned to the proper value, but somewhere deeper it's not being set properly. Looking.

[dblock]

Thanks @xevix for following up on this, looking forward to a PR.

[xevix]

@adrianmacneil I take that back. That's definitely the cause.

@dblock Working on one. Fixing this however breaks some other unit tests, so I'll work on fixing those first.

[amacneil]

Hey, thanks for the pull request and fix :)

I wasn't sure whether this was intended behavior or an actual bug, but thanks for fixing so quickly!

[amacneil]

Fixed by #651

[xevix]

@adrianmacneil Thanks for reporting!