anchor.diff:  
   *select* [<switches>] <anchor_line>.<anchor_column>,<cursor_line>.<cursor_column>...::
       replace the current selections with the ones described in the arguments
  -    
  +
       *-timestamp* <timestamp>:::
           specify which buffer timestamp those coordinates apply to. Uses current
           buffer timestamp if not specified.
  
positive.code: 
      *-title* <text>:::
          set the title of the message box
          
      *-markup*:::
          parse markup in both title (if provided) and text. (See
          <<faces#markup-strings,`:doc faces markup-strings`>>)
  
negative.code: 
  For the following *write* commands, the *-sync* switch forces the synchronization
  of the file onto the filesystem
  
  *arrange-buffers* <buffer>...::
      Reorder the buffers in the buffers list.
      The named buffers will be moved to the front of the buffer list, in the order
      given. Buffers that do not appear in the parameters will remain at the
      end of the list, keeping their current order.
  
  *change-directory* [<directory>]::
      *alias* cd +
  