anchor.diff:   * +cleanup_whitespaces+: remove trailing whitespaces on the previous line
                             when inserting an end-of-line.
    * +expand_tabulations+: insert spaces instead of tab characters
  + * +regex+: takes three arguments: current line regex, inserted text regex
  +      and replacement text. when the current line regex and inserted text
  +      regex matches, replace insereted text with the replacement text.
  +      capture groups are available through $[0-9] escape sequence, and
  +      cursor position can be specified with $c.
    * +group+: same as highlighters group
   
   Hooks
  
positive.code:  * W: select the whole WORD
  
  When it makes sense, _alt-i_ selects the inner object and alt-a the whole
  object. For example _alt-i_ ( will only select the inside of the parenthesis,
  for words, the difference between _alt-i_ and _alt-a_ is that _alt-a_ also
  selects the following blanks.
  
  
negative.code:       unsaved buffers remaining.
   * +wq+: write current buffer and quit
   * +b[uffer] <name>+: switch to buffer <name>
   * +d[el]b[uf] [<name>]+: delete the buffer <name>, use d[el]b[uf]! to force
        deleting a modified buffer.
   * +source <filename>+: execute commands in <filename>
   * +runtime <filename>+: execute commands in <filename>, <filename>
        is relative to kak executable path.
   * +name <name>+: set current client name
   * +exec [-client <name>] <keys>+: execute <keys> as if pressed in normal mode.
        if client if specified, exec keys in the named client context.
   * +eval [-client <name>] <command>+: execute <command> as if entered in command line
        if client if specified, exec command in the named client context.
   * +echo <text>+: show <text> in status line
   * +set{b,w,g} <option> <value>+: set <option> to <value> in *b*uffer, *w*indow
        or *g*lobal scope.
   * +c[ol]a[lias] <name> <colspec>+: define a color alias, so that name can be
        used instead of colspec in contexts where a color is needed.
  
  String syntax
  -------------
  