It is both simpler to code and marginally more general (allows
spaces in arguments).

* lisp/textmodes/yaml-ts-mode.el (yaml-ts-mode-yamllint-options): Use
a list.
(yaml-ts-mode-flymake): Adjust accordingly.

* etc/NEWS: Announce the change.
* src/dispextern.h (struct glyph_row): Add
'extra_line_spacing_above' member.
(struct it): Add 'extra_line_spacing_above' member.
* src/frame.h (struct frame): Add 'extra_line_spacing_above'
member.  Update comment for 'extra_line_spacing.'
* src/buffer.c (syms_of_buffer): Update the docstring of
'line-spacing' to describe the cons cell usage.
* src/buffer.h (struct buffer): Update comment for
'extra_line_spacing'.
* src/frame.c (gui_set_line_spacing): Handle cons cell value for
'line-spacing'.  Calculate and set 'extra_line_spacing_above'
for both integer and float pairs.
* src/xdisp.c (init_iterator): Initialize 'extra_line_spacing_above'
from buffer or frame 'line-spacing', handling cons cells for both
integer and float values.
(gui_produce_glyphs): Use 'extra_line_spacing_above' to distribute
spacing between ascent and descent.  Update 'max_extra_line_spacing'
calculation.
(resize_mini_window): Take line spacing into account when resizing the
mini window.  Pass height of a single line to 'grow_mini_window' and
'shrink_mini_window'.
* src/window.c (grow_mini_window, shrink_mini_window): Add unit
argument which defines height of a single line.
* src/window.h (grow_mini_window, shrink_mini_window): Adjust function
prototypes accordingly with unit argument.
* lisp/subr.el (total-line-spacing): New function to calculate total
spacing from a number or cons cell.
(posn-col-row): Use total-line-spacing.
* lisp/simple.el (default-line-height): Use 'total-line-spacing'.
* lisp/textmodes/picture.el (picture-mouse-set-point): Use
'total-line-spacing'.
* lisp/window.el (window-default-line-height): Use
'total-line-spacing'.
(window--resize-mini-window): Take 'line-spacing' into account.
* test/lisp/subr-tests.el (total-line-spacing): New test.
* test/src/buffer-tests.el (test-line-spacing): New test.
* doc/emacs/display.texi (Display Custom): Document that
'line-spacing' can be a cons cell.
(Line Height): Document the new cons cell format for 'line-spacing'
to allow vertical centering.

Co-authored-by: Przemysław Alexander Kamiński <alexander@kaminski.se>
Co-authored-by: Daniel Mendler <mail@daniel-mendler.de>

* lisp/textmodes/yaml-ts-mode.el (yaml-ts-mode-yamllint-options):
Fix :type and doc string.

* etc/NEWS: Announce the new customization option (bug#80215).
* lisp/textmodes/yaml-ts-mode.el (yaml-ts-mode): New customization group.
(yaml-ts-mode-yamllint-options): New customization option.
(yaml-ts-mode--flymake-process): New variable that stores the reference
to the flymake process.
(yaml-ts-mode-flymake): New function that implements support for Flymake.

* lisp/editorconfig-tools.el:
* lisp/emacs-lisp/shorthands.el:
* lisp/info-xref.el:
* lisp/international/quail.el:
* lisp/international/rfc1843.el:
* lisp/mail/ietf-drums.el:
* lisp/mail/rfc2047.el:
* lisp/mail/yenc.el:
* lisp/net/pop3.el:
* lisp/net/sasl-scram-sha256.el:
* lisp/net/shr-color.el:
* lisp/progmodes/grep.el:
* lisp/scroll-bar.el:
* lisp/textmodes/emacs-news-mode.el:
* lisp/textmodes/reftex-auc.el:
* lisp/textmodes/reftex-dcr.el:
* lisp/textmodes/reftex-global.el:
* lisp/textmodes/reftex-sel.el:
* lisp/url/url-dav.el:
* lisp/vc/vc-src.el:
* lisp/xwidget.el:
* lisp/yank-media.el: Remove redundant (require 'cl-lib).
(Bug#80129)

* lisp/textmodes/text-mode.el (center-line-mode--track-changes):
New local variable for storing the id of the change tracker registered
for the current buffer.
(center-line-mode--track-changes-signal): New function to be called by
the track-changes library whenever there is a change in the current
buffer.
(center-line-mode--track-changes-function): New function called from the
above signal function, iterates over the lines of the modified region,
calling 'center-line' for each non-empty line.
(center-line-mode): New minor mode.
* etc/NEWS: Document the new minor mode.

* lisp/textmodes/ispell.el (ispell-save-corrections-as-abbrevs):
New user option.
(ispell--abbrev-saving-allowed)
(ispell--save-correction-as-abbrev): New variables.
(ispell--maybe-save-correction-abbrev): New function.
(ispell-word, ispell-process-line): Use them to save corrections
as abbrevs when appropriate (bug#79985).
(ispell-command-loop): Add C-u as command character to toggle
abbrev saving for an immediately following replacement command.
(ispell-help): Document C-u binding.

* doc/emacs/fixit.texi (Spelling): Document new feature.

They're always called immediately before a `<` char, in which case
they do the same anyway.  This saves us from having to touch
 `forward-list-function` in addition to `forward-exp-function`.

While at it, change `sgml-tags-invisible` to use `define-minor-mode`.

* lisp/textmodes/sgml-mode.el (sgml-delete-tag)
(sgml-electric-tag-pair-before-change-function): Prefer `forward-sexp`
over `forward-list`.
(sgml-tags-invisible): Define with `define-minor-mode`.  Don't disable
`cursor-sensor-mode` when we don't need it any more, since some other
package may be using it.  Remove redundant binding of `inhibit-read-only`.