each_line cannot be used with table_file

[arbrandes]

I know I should create a branch, pull request etc, but here's a patch I had to apply to get it to work with Redmine 1.1.3:

diff --git a/app/helpers/diff_mailer_helper.rb b/app/helpers/diff_mailer_helper.rb
index 20db31c..700602f 100644
--- a/app/helpers/diff_mailer_helper.rb
+++ b/app/helpers/diff_mailer_helper.rb
@@ -30,7 +30,8 @@ module DiffMailerHelper
       </thead>
       <tbody>]
       prev_line_left, prev_line_right = nil, nil
-      table_file.each_line do |key, line|
+      table_file.keys.sort.each do |key, line|
+         line = table_file[key]
          if prev_line_left && prev_line_right && (line.nb_line_left != prev_line_left + 1) && (line.nb_
           result += %Q[
             <tr>