Autofix rubocop checks.

Library/Homebrew/cask/cask.rb

@@ -168,8 +168,8 @@ module Cask
     end
 
     def to_h_hash_gsubs(hash)
-      hash.to_h.each_with_object({}) do |(key, value), h|
-        h[key] = to_h_gsubs(value)
+      hash.to_h.transform_values do |value|
+        to_h_gsubs(value)
       end
     rescue TypeError
       to_h_array_gsubs(hash)

Library/Homebrew/cask/config.rb

@@ -97,7 +97,7 @@ module Cask
       @manpagedir ||= HOMEBREW_PREFIX/"share/man"
     end
 
-    DEFAULT_DIRS.keys.each do |dir|
+    DEFAULT_DIRS.each_key do |dir|
       define_method(dir) do
         explicit.fetch(dir, env.fetch(dir, default.fetch(dir)))
       end

Library/Homebrew/cask/dsl/conflicts_with.rb

@@ -18,13 +18,13 @@ module Cask
       def initialize(**pairs)
         pairs.assert_valid_keys!(*VALID_KEYS)
 
-        super(Hash[pairs.map { |k, v| [k, Set.new([*v])] }])
+        super(pairs.transform_values { |v| Set.new([*v]) })
 
         self.default = Set.new
       end
 
       def to_json(generator)
-        Hash[map { |k, v| [k, v.to_a] }].to_json(generator)
+        transform_values(&:to_a).to_json(generator)
       end
     end
   end

Library/Homebrew/formula.rb

@@ -1669,7 +1669,7 @@ class Formula
         "root_url" => bottle_spec.root_url,
       }
       bottle_info["files"] = {}
-      bottle_spec.collector.keys.each do |os|
+      bottle_spec.collector.each_key do |os|
         bottle_url = "#{bottle_spec.root_url}/#{Bottle::Filename.create(self, os, bottle_spec.rebuild).bintray}"
         checksum = bottle_spec.collector[os]
         bottle_info["files"][os] = {

Library/Homebrew/linkage_checker.rb

@@ -196,7 +196,7 @@ class LinkageChecker
 
     version_hash = {}
     version_conflict_deps = Set.new
-    @brewed_dylibs.keys.each do |l|
+    @brewed_dylibs.each_key do |l|
       name = l.split("/").last
       unversioned_name, = name.split("@")
       version_hash[unversioned_name] ||= Set.new

Library/Homebrew/test/rubocop_spec.rb

@@ -5,7 +5,7 @@ require "open3"
 describe "RuboCop" do
   context "when calling `rubocop` outside of the Homebrew environment" do
     before do
-      ENV.keys.each do |key|
+      ENV.each_key do |key|
         ENV.delete(key) if key.start_with?("HOMEBREW_")
       end