公共贴吧回帖的主题添加“RE： ”前缀，编辑帖子时的“修改主题”改为“编辑帖子”

app/views/memos/_reply_box.html.erb

@@ -1,5 +1,5 @@
 <%= form_for(@memo_new, url: forum_memos_path, :html => {:multipart => true}) do |f| %>
-		<%= f.hidden_field :subject, :required => true, value: @memo.subject %>
+		<%= f.hidden_field :subject, :required => true, value: "RE: "+@memo.subject %>
 		<%= f.hidden_field :forum_id, :required => true, value: @memo.forum_id %>
 		<%= f.hidden_field :parent_id, :required => true, value: @memo.id %>
     <div id="message_quote" class="wiki"></div>

config/locales/zh.yml

@@ -1938,7 +1938,7 @@ zh:
   label_forum_edit: 编辑讨论区
   label_memo_create: 发布
   label_memo_new: 新建帖子
-  label_memo_edit: 修改主题
+  label_memo_edit: 编辑帖子
   label_memo_new_from_forum: 发布帖子
   label_forum: 公共贴吧
   label_forum_new: 新建贴吧