Fix RuboCop offenses.

Library/Homebrew/extend/os/mac/hardware/cpu.rb

@@ -77,7 +77,7 @@ module Hardware
           "machdep.cpu.features",
           "machdep.cpu.extfeatures",
           "machdep.cpu.leaf7_features",
-        ).split(" ").map { |s| s.downcase.to_sym }
+        ).split.map { |s| s.downcase.to_sym }
       end
 
       def sse4?

Library/Homebrew/formula.rb

@@ -2010,7 +2010,7 @@ class Formula
     @exec_count += 1
     logfn = format("#{logs}/#{active_log_prefix}%02<exec_count>d.%<cmd_base>s",
                    exec_count: @exec_count,
-                   cmd_base:   File.basename(cmd).split(" ").first)
+                   cmd_base:   File.basename(cmd).split.first)
     logs.mkpath
 
     File.open(logfn, "w") do |log|

Library/Homebrew/formula_installer.rb

@@ -1217,7 +1217,7 @@ class FormulaInstaller
       pattern = /#{s.to_s.tr("_", " ")}/i
       forbidden_licenses.sub!(pattern, s.to_s)
     end
-    forbidden_licenses = forbidden_licenses.split(" ").to_h do |license|
+    forbidden_licenses = forbidden_licenses.split.to_h do |license|
       [license, SPDX.license_version_info(license)]
     end
 

Library/Homebrew/rubocops/livecheck.rb

@@ -146,7 +146,7 @@ module RuboCop
 
         def autocorrect(node)
           lambda do |corrector|
-            pattern = node.source.split(" ")[1..].join
+            pattern = node.source.split[1..].join
             corrector.replace(node.source_range, "regex(#{pattern})")
           end
         end

Library/Homebrew/test/exceptions_spec.rb

@@ -81,6 +81,7 @@ describe FormulaClassUnavailableError do
   let(:mod) do
     Module.new do
       class Bar < Requirement; end
+
       class Baz < Formula; end
     end
   end