Commits on Oct 21, 2022

1. Fix an error for Style/RedundantStringEscape cop …

   This PR fixes the following error for `Style/RedundantStringEscape` cop
   when using `?\n` string character literal.
   
   ```console
   % cat example.rb
   ?\n
   
   % bundle exec rubocop --only Style/RedundantStringEscape -d
   (snip)
   
   An error occurred while Style/RedundantStringEscape cop was inspecting /Users/koic/src/github.com/koic/rubocop-issues/11090/example.rb:1:0.
   undefined method `source' for nil:NilClass
   
             delimiters = [node.loc.begin.source[-1], node.loc.end.source[0]]
                                                                  ^^^^^^^
   /Users/koic/src/github.com/rubocop/rubocop/lib/rubocop/cop/style/redundant_string_escape.rb:162:in `delimiter?'
   /Users/koic/src/github.com/rubocop/rubocop/lib/rubocop/cop/style/redundant_string_escape.rb:110:in `single_quoted?'
   /Users/koic/src/github.com/rubocop/rubocop/lib/rubocop/cop/style/redundant_string_escape.rb:103:in `interpolation_not_enabled?'
   /Users/koic/src/github.com/rubocop/rubocop/lib/rubocop/cop/style/redundant_string_escape.rb:85:in `allowed_escape?'
   /Users/koic/src/github.com/rubocop/rubocop/lib/rubocop/cop/style/redundant_string_escape.rb:51:in `block in on_str'
   ```
   
   Similar case to rubocop#11089, but not resolved by rubocop#11090.
   It also removes a bit of unnecessary implementation logic I found.

   

   koic committed Oct 21, 2022
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