One less external call to #active_spec

Library/Homebrew/formula.rb

@@ -212,6 +212,10 @@ class Formula
     active_spec.deprecated_options
   end
 
+  def deprecated_flags
+    active_spec.deprecated_flags
+  end
+
   # If a named option is defined for the currently active {SoftwareSpec}.
   def option_defined?(name)
     active_spec.option_defined?(name)

Library/Homebrew/formula_installer.rb

@@ -154,7 +154,7 @@ class FormulaInstaller
       raise "Unrecognized architecture for --bottle-arch: #{arch}"
     end
 
-    formula.active_spec.deprecated_flags.each do |deprecated_option|
+    formula.deprecated_flags.each do |deprecated_option|
       old_flag = deprecated_option.old_flag
       new_flag = deprecated_option.current_flag
       opoo "#{formula.name}: #{old_flag} was deprecated; using #{new_flag} instead!"