Correct some errors regarding `rescue Exception`
Correct some errors regarding `rescue Exception`

begin; rescue Exception; end

is not the same as

begin: rescue; end

This former is a bad practice which results in processes that don't
respond to `kill` and other signals.  It's rarely what's intended.

theappbusiness/ruby-coding-standards,voxable-labs/ruby-style-guide,theappbusiness/ruby-style-guide