Hi-Lock mode

1. 相关命令      #+CAPTION:键绑定

   Key binding	Command Name	Description
   M-s h l	highlight-lines-matching-regexp	Highlights all lines matching a regular expression
   M-s h p	highlight-phrase	Highlights everything matching a phrase
   M-s h r	highlight-regexp	Highlights everything matching a regular expression
   M-s h u	unhighlight-regexp	Deletes the highlighter under point
   M-s h w	hi-lock-write-interactive-patterns	Inserts a list of Hi-Lock patterns into the buffer
   M-s h f	hi-lock-find-patterns	Searches for Hi-Lock patterns in the buffer to use.

2. 保存高亮设置

   使用命令M-s h w会把当前的高亮设置用注释的方式写在当前文件的头部.

   当Emacs进入hi-lock-mode后,会自动搜索文件头部的10000个字节(由变量`hi-lock-file-patterns-range`决定)找到高亮信息并执行高亮操作

   Emacs进入hi-lock-mode后,若搜索到有高亮设置信息,会提示你是否应用该高亮信息,若想自动应用该高亮信息在.emacs中添加如下配置项

   (global-hi-lock-mode 1)
   (setq hi-lock-file-patterns-policy #'(lambda (dummy) t))