[Correctable] Layout/IndentationWidth: Use 2 (not 0) spaces for indentation. (https://rubystyle.guide#spaces-indentation)

[Correctable] Style/RedundantReturn: Redundant return detected. (https://rubystyle.guide#no-explicit-return)

[Correctable] Style/CombinableLoops: Combine this loop with the previous loop.

[Correctable] Style/IfUnlessModifier: Favor modifier if usage when having a single-line body. Another good alternative is the usage of control flow &&/||. (https://rubystyle.guide#if-as-a-modifier)

[Correctable] Layout/EmptyLineAfterGuardClause: Add empty line after guard clause.

[Correctable] Style/CombinableLoops: Combine this loop with the previous loop.

[Correctable] Style/IfUnlessModifier: Favor modifier if usage when having a single-line body. Another good alternative is the usage of control flow &&/||. (https://rubystyle.guide#if-as-a-modifier)

[Correctable] Style/NumericPredicate: Use request_custom_emoji.state.zero? instead of request_custom_emoji.state == 0. (https://rubystyle.guide#predicate-methods)

[Correctable] Style/CombinableLoops: Combine this loop with the previous loop.

[Correctable] Style/SymbolProc: Pass &:destroy as an argument to each instead of a block.

Lint/DuplicateMethods: Method ApplicationMailer#set_autoreply_headers! is defined at both app/mailers/application_mailer.rb:18 and app/mailers/application_mailer.rb:24.