remove encode lib, clean all encoded area.

app/views/blame/show.html.haml

@@ -15,7 +15,7 @@
     .file_title
       %i.icon-file
       %span.file_name
-        = @tree.name.force_encoding('utf-8')
+        = @tree.name
         %small= number_to_human_size @tree.size
       %span.options= render "tree/blob_actions"
     .file_content.blame
@@ -32,4 +32,4 @@
             %td.lines
               = preserve do
                 %pre
-                  = Gitlab::Encode.utf8 lines.join("\n")
+                  = lines.join("\n")

app/views/tree/_blob.html.haml

@@ -2,7 +2,7 @@
   .file_title
     %i.icon-file
     %span.file_name
-      = blob.name.force_encoding('utf-8')
+      = blob.name
       %small= number_to_human_size blob.size
     %span.options= render "tree/blob_actions"
   - if blob.text?

app/views/tree/edit.html.haml

@@ -4,7 +4,7 @@
       .file_title
         %i.icon-file
         %span.file_name
-          = "#{@tree.path.force_encoding('utf-8')} (#{@ref})"
+          = "#{@tree.path} (#{@ref})"
       .file_content.code
         #editor= @tree.data