diff --git a/Library/Homebrew/.simplecov b/Library/Homebrew/.simplecov
index aa76087f47..9bdc0df93f 100755
--- a/Library/Homebrew/.simplecov
+++ b/Library/Homebrew/.simplecov
@@ -45,8 +45,9 @@ SimpleCov.start do
   else
     command_name "#{command_name} (#{$PROCESS_ID})"
 
+    excludes = ["test", "vendor"]
     subdirs = Dir.chdir(SimpleCov.root) { Dir.glob("*") }
-                 .reject { |d| d.end_with?(".rb") || ["test", "vendor"].include?(d) }
+                 .reject { |d| d.end_with?(".rb") || excludes.include?(d) }
                  .map { |d| "#{d}/**/*.rb" }.join(",")
 
     # Not using this during integration tests makes the tests 4x times faster
diff --git a/Library/Homebrew/cask/artifact/abstract_uninstall.rb b/Library/Homebrew/cask/artifact/abstract_uninstall.rb
index e6d17348d5..9cce7ed341 100644
--- a/Library/Homebrew/cask/artifact/abstract_uninstall.rb
+++ b/Library/Homebrew/cask/artifact/abstract_uninstall.rb
@@ -85,9 +85,10 @@ module Cask
 
       # :launchctl must come before :quit/:signal for cases where app would instantly re-launch
       def uninstall_launchctl(*services, command: nil, **_)
+        booleans = [false, true]
         services.each do |service|
           ohai "Removing launchctl service #{service}"
-          [false, true].each do |with_sudo|
+          booleans.each do |with_sudo|
             plist_status = command.run(
               "/bin/launchctl",
               args: ["list", service],
diff --git a/Library/Homebrew/cask/audit.rb b/Library/Homebrew/cask/audit.rb
index 49a632c8de..39d6d7d3ed 100644
--- a/Library/Homebrew/cask/audit.rb
+++ b/Library/Homebrew/cask/audit.rb
@@ -204,7 +204,8 @@ module Cask
       end
       add_error "at least one name stanza is required" if cask.name.empty?
       # TODO: specific DSL knowledge should not be spread around in various files like this
-      installable_artifacts = cask.artifacts.reject { |k| [:uninstall, :zap].include?(k) }
+      rejected_artifacts = [:uninstall, :zap]
+      installable_artifacts = cask.artifacts.reject { |k| rejected_artifacts.include?(k) }
       add_error "at least one activatable artifact stanza is required" if installable_artifacts.empty?
     end
 
diff --git a/Library/Homebrew/dev-cmd/audit.rb b/Library/Homebrew/dev-cmd/audit.rb
index 59c13f63e1..a6bbd70544 100644
--- a/Library/Homebrew/dev-cmd/audit.rb
+++ b/Library/Homebrew/dev-cmd/audit.rb
@@ -893,8 +893,9 @@ module Homebrew
 
         bin_names += dir.children.map(&:basename).map(&:to_s)
       end
+      shell_commands = ["system", "shell_output", "pipe_output"]
       bin_names.each do |name|
-        ["system", "shell_output", "pipe_output"].each do |cmd|
+        shell_commands.each do |cmd|
           if text.to_s.match?(/test do.*#{cmd}[(\s]+['"]#{Regexp.escape(name)}[\s'"]/m)
             problem %Q(fully scope test #{cmd} calls, e.g. #{cmd} "\#{bin}/#{name}")
           end
diff --git a/Library/Homebrew/dev-cmd/bottle.rb b/Library/Homebrew/dev-cmd/bottle.rb
index e5168bd931..9574a1ba91 100644
--- a/Library/Homebrew/dev-cmd/bottle.rb
+++ b/Library/Homebrew/dev-cmd/bottle.rb
@@ -453,13 +453,14 @@ module Homebrew
       end
     end
 
+    any_cellars = ["any", "any_skip_relocation"]
     bottles_hash.each do |formula_name, bottle_hash|
       ohai formula_name
 
       bottle = BottleSpecification.new
       bottle.root_url bottle_hash["bottle"]["root_url"]
       cellar = bottle_hash["bottle"]["cellar"]
-      cellar = cellar.to_sym if ["any", "any_skip_relocation"].include?(cellar)
+      cellar = cellar.to_sym if any_cellars.include?(cellar)
       bottle.cellar cellar
       bottle.prefix bottle_hash["bottle"]["prefix"]
       bottle.rebuild bottle_hash["bottle"]["rebuild"]
@@ -478,14 +479,14 @@ module Homebrew
             update_or_add = "update"
             if args.keep_old?
               mismatches = []
+              valid_keys = %w[root_url prefix cellar rebuild sha1 sha256]
               bottle_block_contents = s.inreplace_string[/  bottle do(.+?)end\n/m, 1]
               bottle_block_contents.lines.each do |line|
                 line = line.strip
                 next if line.empty?
 
                 key, old_value_original, _, tag = line.split " ", 4
-                valid_key = %w[root_url prefix cellar rebuild sha1 sha256].include? key
-                next unless valid_key
+                next unless valid_keys.include?(key)
 
                 old_value = old_value_original.to_s.delete "'\""
                 old_value = old_value.to_s.delete ":" if key != "root_url"
diff --git a/Library/Homebrew/env_config.rb b/Library/Homebrew/env_config.rb
index fbcc9eaf2a..a8ac5d5a2a 100644
--- a/Library/Homebrew/env_config.rb
+++ b/Library/Homebrew/env_config.rb
@@ -306,6 +306,11 @@ module Homebrew
       method_name
     end
 
+    CUSTOM_IMPLEMENTATIONS = %w[
+      HOMEBREW_MAKE_JOBS
+      HOMEBREW_CASK_OPTS
+    ].freeze
+
     ENVS.each do |env, hash|
       method_name = env_method_name(env, hash)
       env = env.to_s
@@ -316,7 +321,7 @@ module Homebrew
         end
       elsif hash[:default].present?
         # Needs a custom implementation.
-        next if ["HOMEBREW_MAKE_JOBS", "HOMEBREW_CASK_OPTS"].include?(env)
+        next if CUSTOM_IMPLEMENTATIONS.include?(env)
 
         define_method(method_name) do
           ENV[env].presence || hash.fetch(:default).to_s
diff --git a/Library/Homebrew/formula_cellar_checks.rb b/Library/Homebrew/formula_cellar_checks.rb
index 4bed3fc569..7c71590d28 100644
--- a/Library/Homebrew/formula_cellar_checks.rb
+++ b/Library/Homebrew/formula_cellar_checks.rb
@@ -154,7 +154,9 @@ module FormulaCellarChecks
     # Emacs itself can do what it wants
     return if name == "emacs"
 
-    elisps = (share/"emacs/site-lisp").children.select { |file| %w[.el .elc].include? file.extname }
+    elisps = (share/"emacs/site-lisp").children.select do |file|
+      Keg::ELISP_EXTENSIONS.include? file.extname
+    end
     return if elisps.empty?
 
     <<~EOS
diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index d2b3afc72d..8c8140190c 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -122,6 +122,10 @@ class Keg
     mime-info pixmaps sounds postgresql
   ].freeze
 
+  ELISP_EXTENSIONS = %w[.el .elc].freeze
+  PYC_EXTENSIONS = %w[.pyc .pyo].freeze
+  LIBTOOL_EXTENSIONS = %w[.la .lai].freeze
+
   # Given an array of kegs, this method will try to find some other kegs
   # that depend on them. If it does, it returns:
   #
@@ -423,7 +427,7 @@ class Keg
   def elisp_installed?
     return false unless (path/"share/emacs/site-lisp"/name).exist?
 
-    (path/"share/emacs/site-lisp"/name).children.any? { |f| %w[.el .elc].include? f.extname }
+    (path/"share/emacs/site-lisp"/name).children.any? { |f| ELISP_EXTENSIONS.include? f.extname }
   end
 
   def version
@@ -559,7 +563,7 @@ class Keg
   end
 
   def delete_pyc_files!
-    find { |pn| pn.delete if %w[.pyc .pyo].include?(pn.extname) }
+    find { |pn| pn.delete if PYC_EXTENSIONS.include?(pn.extname) }
     find { |pn| FileUtils.rm_rf pn if pn.basename.to_s == "__pycache__" }
   end
 
@@ -652,7 +656,7 @@ class Keg
         # Don't link pyc or pyo files because Python overwrites these
         # cached object files and next time brew wants to link, the
         # file is in the way.
-        Find.prune if %w[.pyc .pyo].include?(src.extname) && src.to_s.include?("/site-packages/")
+        Find.prune if PYC_EXTENSIONS.include?(src.extname) && src.to_s.include?("/site-packages/")
 
         case yield src.relative_path_from(root)
         when :skip_file, nil
diff --git a/Library/Homebrew/keg_relocate.rb b/Library/Homebrew/keg_relocate.rb
index bc9d32b879..1bdf422dca 100644
--- a/Library/Homebrew/keg_relocate.rb
+++ b/Library/Homebrew/keg_relocate.rb
@@ -170,7 +170,7 @@ class Keg
     libtool_files = []
 
     path.find do |pn|
-      next if pn.symlink? || pn.directory? || ![".la", ".lai"].include?(pn.extname)
+      next if pn.symlink? || pn.directory? || !Keg::LIBTOOL_EXTENSIONS.include?(pn.extname)
 
       libtool_files << pn
     end
diff --git a/Library/Homebrew/rubocops/deprecate_disable.rb b/Library/Homebrew/rubocops/deprecate_disable.rb
index e767c39330..79f21dcfb4 100644
--- a/Library/Homebrew/rubocops/deprecate_disable.rb
+++ b/Library/Homebrew/rubocops/deprecate_disable.rb
@@ -37,6 +37,8 @@ module RuboCop
 
       # This cop audits deprecate! reason
       class DeprecateDisableReason < FormulaCop
+        PUNCTUATION_MARKS = %w[. ! ?].freeze
+
         def audit_formula(_node, _class_node, _parent_class_node, body_node)
           [:deprecate!, :disable!].each do |method|
             node = find_node_method_by_name(body_node, method)
@@ -53,7 +55,7 @@ module RuboCop
 
               problem "Do not start the reason with `it`" if reason_string.start_with?("it ")
 
-              problem "Do not end the reason with a punctuation mark" if %w[. ! ?].include?(reason_string[-1])
+              problem "Do not end the reason with a punctuation mark" if PUNCTUATION_MARKS.include?(reason_string[-1])
             end
 
             next if reason_found
@@ -73,7 +75,7 @@ module RuboCop
           lambda do |corrector|
             reason = string_content(node)
             reason = reason[3..] if reason.start_with?("it ")
-            reason.chop! if %w[. ! ?].include?(reason[-1])
+            reason.chop! if PUNCTUATION_MARKS.include?(reason[-1])
             corrector.replace(node.source_range, "\"#{reason}\"")
           end
         end
diff --git a/Library/Homebrew/style.rb b/Library/Homebrew/style.rb
index ea3abd0ea5..32cfd2e8ac 100644
--- a/Library/Homebrew/style.rb
+++ b/Library/Homebrew/style.rb
@@ -178,6 +178,7 @@ module Homebrew
         json = json_result!(result)
 
         # Convert to same format as RuboCop offenses.
+        severity_hash = { "style" => "refactor", "info" => "convention" }
         json.group_by { |v| v["file"] }
             .map do |k, v|
           {
@@ -188,7 +189,7 @@ module Homebrew
               o["cop_name"] = "SC#{o.delete("code")}"
 
               level = o.delete("level")
-              o["severity"] = { "style" => "refactor", "info" => "convention" }.fetch(level, level)
+              o["severity"] = severity_hash.fetch(level, level)
 
               line = o.delete("line")
               column = o.delete("column")
diff --git a/Library/Homebrew/utils/github.rb b/Library/Homebrew/utils/github.rb
index 0d6f66eb51..f14b4e6387 100644
--- a/Library/Homebrew/utils/github.rb
+++ b/Library/Homebrew/utils/github.rb
@@ -433,9 +433,10 @@ module GitHub
     result = open_graphql(query, scopes: ["user:email"])
     reviews = result["repository"]["pullRequest"]["reviews"]["nodes"]
 
+    valid_associations = %w[MEMBER OWNER]
     reviews.map do |r|
       next if commit.present? && commit != r["commit"]["oid"]
-      next unless %w[MEMBER OWNER].include? r["authorAssociation"]
+      next unless valid_associations.include? r["authorAssociation"]
 
       email = if r["author"]["email"].blank?
         "#{r["author"]["databaseId"]}+#{r["author"]["login"]}@users.noreply.github.com"