Enable `Style/RedundantReturn` rubocop rule, and fixed a couple more

Follow up of #31004.

5 files changed, 14 insertions, 10 deletions

diff --git a/.rubocop.yml b/.rubocop.yml
index ec33b1ee33..399fc66730 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -136,6 +136,10 @@ Lint/EndAlignment:
 Lint/RequireParentheses:
   Enabled: true
 
+Style/RedundantReturn:
+  Enabled: true
+  AllowMultipleReturnValues: true
+
 Style/Semicolon:
   Enabled: true
   AllowAsExpressionSeparator: true
diff --git a/actioncable/lib/action_cable/connection/client_socket.rb b/actioncable/lib/action_cable/connection/client_socket.rb
index ba33c8b982..10289ab55c 100644
--- a/actioncable/lib/action_cable/connection/client_socket.rb
+++ b/actioncable/lib/action_cable/connection/client_socket.rb
@@ -21,7 +21,7 @@ module ActionCable
         return true if env["HTTP_X_FORWARDED_PROTO"] == "https"
         return true if env["rack.url_scheme"] == "https"
 
-        return false
+        false
       end
 
       CONNECTING = 0
diff --git a/activerecord/test/cases/adapters/mysql2/active_schema_test.rb b/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
index a6b83ec377..4e73c557ed 100644
--- a/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
@@ -9,7 +9,7 @@ class Mysql2ActiveSchemaTest < ActiveRecord::Mysql2TestCase
   def setup
     ActiveRecord::Base.connection.singleton_class.class_eval do
       alias_method :execute_without_stub, :execute
-      def execute(sql, name = nil) return sql end
+      def execute(sql, name = nil) sql end
     end
   end
 
diff --git a/activesupport/lib/active_support/core_ext/numeric/conversions.rb b/activesupport/lib/active_support/core_ext/numeric/conversions.rb
index e675f32cd4..f6c2713986 100644
--- a/activesupport/lib/active_support/core_ext/numeric/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/numeric/conversions.rb
@@ -108,19 +108,19 @@ module ActiveSupport::NumericWithFormat
     when Integer, String
       super(format)
     when :phone
-      return ActiveSupport::NumberHelper.number_to_phone(self, options || {})
+      ActiveSupport::NumberHelper.number_to_phone(self, options || {})
     when :currency
-      return ActiveSupport::NumberHelper.number_to_currency(self, options || {})
+      ActiveSupport::NumberHelper.number_to_currency(self, options || {})
     when :percentage
-      return ActiveSupport::NumberHelper.number_to_percentage(self, options || {})
+      ActiveSupport::NumberHelper.number_to_percentage(self, options || {})
     when :delimited
-      return ActiveSupport::NumberHelper.number_to_delimited(self, options || {})
+      ActiveSupport::NumberHelper.number_to_delimited(self, options || {})
     when :rounded
-      return ActiveSupport::NumberHelper.number_to_rounded(self, options || {})
+      ActiveSupport::NumberHelper.number_to_rounded(self, options || {})
     when :human
-      return ActiveSupport::NumberHelper.number_to_human(self, options || {})
+      ActiveSupport::NumberHelper.number_to_human(self, options || {})
     when :human_size
-      return ActiveSupport::NumberHelper.number_to_human_size(self, options || {})
+      ActiveSupport::NumberHelper.number_to_human_size(self, options || {})
     when Symbol
       super()
     else
diff --git a/guides/rails_guides/levenshtein.rb b/guides/rails_guides/levenshtein.rb
index bafa6bfe9d..c48af797fa 100644
--- a/guides/rails_guides/levenshtein.rb
+++ b/guides/rails_guides/levenshtein.rb
@@ -38,7 +38,7 @@ module RailsGuides
         d[m] = x
       end
 
-      return x
+      x
     end
   end
 end