Fix RuboCop offenses.

Library/Homebrew/cask/artifact/abstract_artifact.rb

@@ -45,7 +45,7 @@ module Cask
 
       def <=>(other)
         return unless other.class < AbstractArtifact
-        return 0 if self.class == other.class
+        return 0 if instance_of?(other.class)
 
         @@sort_order ||= [ # rubocop:disable Style/ClassVars
           PreflightBlock,

Library/Homebrew/config.rb

@@ -54,8 +54,7 @@ HOMEBREW_CACHE_FORMULA = (HOMEBREW_CACHE/"Formula").freeze
 HOMEBREW_LOGS = Pathname.new(get_env_or_raise("HOMEBREW_LOGS")).expand_path.freeze
 
 # Must use `/tmp` instead of `TMPDIR` because long paths break Unix domain sockets
-HOMEBREW_TEMP = begin
-  tmp = Pathname.new(get_env_or_raise("HOMEBREW_TEMP"))
+HOMEBREW_TEMP = Pathname.new(get_env_or_raise("HOMEBREW_TEMP")).yield_self do |tmp|
   tmp.mkpath unless tmp.exist?
   tmp.realpath
 end.freeze

Library/Homebrew/formulary.rb

@@ -218,8 +218,7 @@ module Formulary
     end
 
     def load_file(flags:)
-      if url =~ %r{githubusercontent.com/[\w-]+/[\w-]+/[a-f0-9]{40}(/Formula)?/([\w+-.@]+).rb}
-        formula_name = Regexp.last_match(2)
+      if %r{githubusercontent.com/[\w-]+/[\w-]+/[a-f0-9]{40}(?:/Formula)?/(?<formula_name>[\w+-.@]+).rb} =~ url # rubocop:disable Style/CaseLikeIf
         odisabled "Installation of #{formula_name} from a GitHub commit URL",
                   "'brew extract #{formula_name}' to stable tap on GitHub"
       elsif url.match?(%r{^(https?|ftp)://})
@@ -232,8 +231,8 @@ module Formulary
       curl_download url, to: path
       super
     rescue MethodDeprecatedError => e
-      if url =~ %r{github.com/([\w-]+)/([\w-]+)/}
-        e.issues_url = "https://github.com/#{Regexp.last_match(1)}/#{Regexp.last_match(2)}/issues/new"
+      if %r{github.com/(?<user>[\w-]+)/(?<repo>[\w-]+)/} =~ url
+        e.issues_url = "https://github.com/#{user}/#{repo}/issues/new"
       end
       raise
     end

Library/Homebrew/rubocops/extend/formula.rb

@@ -395,7 +395,7 @@ module RuboCop
         @offense_source_range = method_node.source_range
         params.all? do |given_param|
           method_params.any? do |method_param|
-            if given_param.class == Regexp
+            if given_param.instance_of?(Regexp)
               regex_match_group(method_param, given_param)
             else
               node_equals?(method_param, given_param)

Library/Homebrew/rubocops/uses_from_macos.rb

@@ -79,9 +79,9 @@ module RuboCop
 
         def audit_formula(_node, _class_node, _parent_class_node, body_node)
           find_method_with_args(body_node, :uses_from_macos, /^"(.+)"/).each do |method|
-            dep = if parameters(method).first.class == RuboCop::AST::StrNode
+            dep = if parameters(method).first.instance_of?(RuboCop::AST::StrNode)
               parameters(method).first
-            elsif parameters(method).first.class == RuboCop::AST::HashNode
+            elsif parameters(method).first.instance_of?(RuboCop::AST::HashNode)
               parameters(method).first.keys.first
             end