master updated (b83f274 -> 0facaee)

[Mattias Engdegård]

mattiase pushed a change to branch master.

      from  b83f274   Add missing "this is documented" marker to previous 
checkin
       new  204273c   Fix byte-compilation of (+ -0.0) (bug#42597)
       new  0facaee   Clean up and improve compilation of arithmetic (bug#42597)


Summary of changes:
 lisp/emacs-lisp/byte-opt.el            | 29 +++++++----
 lisp/emacs-lisp/bytecomp.el            | 93 ++++++++++++++++------------------
 test/lisp/emacs-lisp/bytecomp-tests.el |  5 ++
 3 files changed, 67 insertions(+), 60 deletions(-)