The `pp-fill` code sometimes end up generating things like:
(foo .
bar)
instead of
(foo
. bar)
so make sure we cut before rather than after the dot (and open
parens while we're at it).
* lisp/emacs-lisp/pp.el (pp-fill): Cut before parens and dots.
* test/lisp/emacs-lisp/pp-tests.el (pp-tests--dimensions): New function.
(pp-tests--cut-before): New test.
* lisp/emacs-lisp/pp.el (pp-to-string, pp-buffer, pp): Preserve old
behavior of (almost always) returning a trailing newline.
* test/lisp/emacs-lisp/pp-tests.el (pp-print-quote): Adjust tests, now
that `pp-to-string` always returns a trailing newline, rather than only
most of the time.
* test/lisp/emacs-lisp/backtrace-tests.el
(backtrace-tests--single-and-multi-line): Make the test less sensitive
to the choice of what is "pretty".
Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November. Change these FTP URLs to https://ftp.gnu.org
instead. Make similar changes for URLs to other organizations moving
away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.
Additionally, do some minor code cleanup.
* lisp/emacs-lisp/pp.el: Set lexical-binding.
(pp-buffer): Use skip-syntax-forward.
(pp-eval-expression): Use push.
(pp-last-sexp): Use with-syntax-table.
* test/lisp/emacs-lisp/pp-tests.el: New tests.
