* lisp/emacs-lisp/float-sup.el (float-pi): New name for `pi'.

* lisp/emacs-lisp/float-sup.el (float-pi): New name for `pi'.
(float-e): New name for `e'.
(degrees-to-radians, radians-to-degrees):
* lisp/calendar/solar.el (solar-longitude):
* lisp/calculator.el (calculator-registers, calculator-funcall):
* lisp/textmodes/artist.el (artist-spray-random-points):
* lisp/play/bubbles.el (bubbles--initialize-images): Use new names.