9d6a3ac73a Mention pcase as a fifth conditional form
567cb9046d Overhaul pcase documentation
4d7e54acff Use EXPVAL in docstrings of patterns defined using pcase-d...
7e8227ed68 Introduce EXPVAL for pcase, pcase-defmacro docstrings
e6de5b3d51 Ensure pcase doc shows `QPAT first among extensions
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.
* lisp/help-fns.el (help-definition-prefixes): New var and function.
(help--loaded-p, help--load-prefixes, help--symbol-completion-table):
New functions.
(describe-function, describe-variable): Use them.
* lisp/emacs-lisp/radix-tree.el (radix-tree--prefixes)
(radix-tree-prefixes, radix-tree-from-map): New functions.
