Commits on Apr 4, 2020

1. [Fix rubocop#7842] Add AcceptImplicitNamespaces to `Lint/RaiseExcep… …

   …tion`
   
   Fixes rubocop#7842.
   
   This PR adds `AcceptImplicitNamespaces` option to `Lint/RaiseException`.
   
   Users can specify and accept an implicit namespace as follows:
   
   ```yaml
   Lint/RaiseException:
     AllowImplicitNamespaces:
       - 'Gem'
   ```
   
   ```ruby
   # good
   module Gem
     def self.foo
       raise Exception
     end
   end
   
   Gem.foo #=> Gem::Exception
   ```
   
   `Gem` is specified by default.
   https://ruby-doc.org/stdlib-2.7.0/libdoc/rubygems/rdoc/Gem/Exception.html
   
   This way does not prevent all false positives, but it expect some cases
   can be solved.

   

   koic committed Apr 4, 2020
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