refactor each_line detect to detect all diff file

app/views/commits/_text_file.html.haml

 %table
   - line_old = 0
   - line_new = 0
-  - lines_arr = diff.diff.lines.to_a
+  - diff_str = encode(diff.diff)
+  - lines_arr = diff_str.lines.to_a
   - lines_arr.each do |line|
-    - line = encode(line)
     - next if line.match(/^--- \/dev\/null/)
     - next if line.match(/^--- a/)
     - next if line.match(/^\+\+\+ b/)

lib/utils.rb

@@ -23,6 +23,8 @@ module Utils
         string.force_encoding(cd.encoding)
       end
       string.encode("utf-8", :undef => :replace, :replace => "?", :invalid => :replace)
+    rescue
+      "Invalid code encoding"
     end
   end