I've been wondering about adding these for a fair while
  now, but they _are_ nice when writing eg. certain kinds
  of macros,

  Add bunch of missing symbols to the manual, and go over several
  docstrings reformatting them for the benefit of the documentation
  generator.

  (A crapton of symbols are still not in the manual.)

fix: drop a leftover break from parse-ordinary-lambda-list (hint: setup bright red face for BREAK and PRINT... :)

* macros.lisp (parse-body): Don't use ALEXANDRIA:STARTS-WITH.

    The reason is that this way PARSE-BODY is a completely
    standalone definition, and can hence be used in consequent
    macro definitions within the Alexandria project without
    having to worrying if `sequences.lisp' has already been
    loaded (where STARTS-WITH is defined.)

 * Support (once-only ((nx x)) ...) style also.