revert the changes from c60995f3 - related to marking sub,gsub as unavailable...

revert the changes from c60995f3 - related to marking sub,gsub as unavailable to use with safe strings

activesupport/lib/active_support/core_ext/string/output_safety.rb

@@ -76,7 +76,6 @@ def html_safe?
 module ActiveSupport #:nodoc:
   class SafeBuffer < String
     UNSAFE_STRING_METHODS = ["capitalize", "chomp", "chop", "delete", "downcase", "gsub", "lstrip", "next", "reverse", "rstrip", "slice", "squeeze", "strip", "sub", "succ", "swapcase", "tr", "tr_s", "upcase"].freeze
-    UNAVAILABLE_STRING_METHODS = []
 
     alias_method :original_concat, :concat
     private :original_concat
@@ -155,24 +154,6 @@ def #{unsafe_method}!(*args)              # def capitalize!(*args)
       EOT
     end
 
-    UNAVAILABLE_STRING_METHODS.each do |unavailable_method|
-      class_eval <<-EOT, __FILE__, __LINE__
-        # def gsub(*args)
-        #   raise NoMethodError, "gsub cannot be used with a safe string. You should use object.to_str.gsub"
-        # end
-        def #{unavailable_method}(*args)
-          raise NoMethodError, "#{unavailable_method} cannot be used with a safe string. You should use object.to_str.#{unavailable_method}"
-        end
-
-        # def gsub!(*args)
-        #   raise NoMethodError, "gsub! cannot be used with a safe string. You should use object.to_str.gsub!"
-        # end
-        def #{unavailable_method}!(*args)
-          raise NoMethodError, "#{unavailable_method}! cannot be used with a safe string. You should use object.to_str.#{unavailable_method}!"
-        end
-      EOT
-    end
-
     protected
 
     def dirty?
@@ -185,4 +166,4 @@ class String
   def html_safe
     ActiveSupport::SafeBuffer.new(self)
   end
-end
\ No newline at end of file
+end