Fixed style issue offenses from brew style.

Library/Homebrew/extend/os/mac/formula_cellar_checks.rb

@@ -69,7 +69,7 @@ module FormulaCellarChecks
     DatabaseCache.new(:linkage) do |database_cache|
       checker = LinkageChecker.new(keg, database_cache, false, formula)
 
-      return unless checker.broken_library_linkage?
+      next unless checker.broken_library_linkage?
       output = <<~EOS
         #{formula} has broken dynamic library links:
           #{checker.display_test_output}

Library/Homebrew/linkage_checker.rb

@@ -50,7 +50,6 @@ class LinkageChecker
     @unnecessary_deps ||= store.fetch_type(:unnecessary_deps)
   end
 
-
   def display_normal_output
     display_items "System libraries", system_dylibs
     display_items "Homebrew libraries", brewed_dylibs