* lisp/outline.el (outline-font-lock-keywords): Use OVERRIDE or
LAXMATCH depending on outline-minor-mode-highlight in outline-minor-mode.
(outline-minor-mode-cycle, outline-minor-mode-highlight): Promote
defvar to defcustom.
(outline-minor-mode-highlight-buffer): Don't override existing faces.
(outline-cycle-minor-mode, outline-cycle-highlight-minor-mode):
Remove minor modes.
* etc/compilation.txt:
* etc/grep.txt: Enable outline-minor-mode-cycle and
outline-minor-mode-highlight with outline-minor-mode.
https://lists.gnu.org/archive/html/emacs-devel/2021-03/msg00144.html
* lisp/outline.el (outline-mode-cycle-map): New keymap from outline-mode-map.
(outline-mode-map): Inherit from outline-mode-cycle-map.
(outline-font-lock-keywords): Append keymap and face depending on
'outline-minor-mode-cycle' and 'outline-minor-mode-highlight'.
(outline-minor-mode-cycle, outline-minor-mode-highlight): New variables.
(outline-minor-mode-highlight-buffer): New function.
(outline-minor-mode): Handle 'outline-minor-mode-cycle' and
'outline-minor-mode-highlight'.
(outline-cycle-minor-mode, outline-cycle-highlight-minor-mode):
New minor modes (bug#45147).
* etc/compilation.txt:
* etc/grep.txt:
Enable outline-cycle-highlight-minor-mode.
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.
* doc/lispref/searching.texi (String Search): Incremental word search fixes.
* lisp/sort.el (delete-duplicate-lines): Remove `:weakness 'key'
from `make-hash-table'.
* lisp/textmodes/ispell.el (ispell-init-process): Change message format
to be consistent with other messages.
* etc/grep.txt: Add `eval' to the Local Variables section that
emulates `grep-filter'.
* lisp/progmodes/grep.el (grep-filter): Avoid incomplete processing by
keeping point where processing of grep matches begins, and
continue to delete remaining escape sequences from the same point.
(grep-filter): Make leading zero optional in "0?1;31m" because
git-grep emits "\033[1;31m" escape sequences unlike expected
"\033[01;31m" as GNU Grep does.
(grep-process-setup): Replace obsolete "ml=" with newer "sl=".
Fixes: debbugs:9408
