header.rb in mail-2.6.4.rc2

- old
+ new

@@ -47,11 +47,11 @@
     # no automatic processing of that field will happen.  If you find one of
     # these cases, please make a patch and send it in, or at the least, send
     # me the example so we can fix it.
     def initialize(header_text = nil, charset = nil)
       @charset = charset
-      self.raw_source = header_text.to_crlf.lstrip
+      self.raw_source = ::Mail::Utilities.to_crlf(header_text).lstrip
       split_header if header_text
     end
 
     def initialize_copy(original)
       super
@@ -202,10 +202,10 @@
                            return-path content-type mime-version
                            content-transfer-encoding content-description 
                            content-id content-disposition content-location]
 
     def encoded
-      buffer = ''
+      buffer = String.new
       buffer.force_encoding('us-ascii') if buffer.respond_to?(:force_encoding)
       fields.each do |field|
         buffer << field.encoded
       end
       buffer