anchor.diff:  :unalias <scope> <alias> [<expected>]
   -------------------------------------
   
  -Will remove the given alias in the given scope. If `<expected>` is specified
  +will remove the given alias in the given scope. If `<expected>` is specified
   the alias will only be removed if its current value is `<expected>`.
   
   FIFO Buffer
   ~~~~~~~~~~~
   
  -the `:edit` command can take a -fifo parameter:
  +the `:edit` command can take a `-fifo` parameter:
   
   ---------------------------------------------
   :edit -fifo <filename> [-scroll] <buffername>
   ---------------------------------------------
   
  -in this case, a buffer named `<buffername>` is created which reads its content
  +In this case, a buffer named `<buffername>` is created which reads its content
   from fifo `<filename>`. When the fifo is written to, the buffer is automatically
   updated.
   
  
positive.code: Regions highlighters
  ^^^^^^^^^^^^^^^^^^^^
  
  A special highlighter provide a way to segment the buffer into regions, which are
  to be highlighted differently.
  
  A region is defined by 4 parametes:
  
negative.code:  * *w* : buffer word completion
   * *l* : buffer line completion
   * *o* : option based completion
  
  Completion candidates can be selected using `ctrl-n` and `ctrl-p`.
  
  Highlighters
  ~~~~~~~~~~~~
  