* lisp/progmodes/python.el (python-shell-completion-at-point): Also
stop on simple-operator while parsing input.

The `not' and `intersection' forms, and `or' inside these forms,
now accept characters and single-character strings as arguments.
Previously, they had to be wrapped in `any' forms.
This does not add expressive power but is a convenience and is easily
understood.

* doc/lispref/searching.texi (Rx Constructs): Amend the documentation.
* etc/NEWS: Announce the change.
* lisp/emacs-lisp/rx.el (rx--charset-p, rx--translate-not)
(rx--charset-intervals, rx): Accept characters and 1-char strings in
more places.
* test/lisp/emacs-lisp/rx-tests.el (rx-not, rx-charset-or)
(rx-def-in-charset-or, rx-intersection): Test the change.

* lisp/help.el (help-uni-confusables, help-uni-confusables-regexp):
Rename from uni-confusable and uni-confusables-regexp, respectively.
(help-uni-confusable-suggestions): Use ngettext.  Use new variable
name.
* lisp/emacs-lisp/lisp-mode.el (lisp--match-confusable-symbol-character):
Use new variable name.

* src/xdisp.c (face_at_pos): Revert previous change that
rejected the underlying face if it failed the filtering
criteria.
* src/xfaces.c (face_at_string_position): Reset the base face's
attribute used for filtering faces if the attribute is t.
(Bug#38563)

Design change suggested by Stefan Monnier.

* doc/lispref/searching.texi (Rx Constructs):
* etc/NEWS: Document.
* lisp/emacs-lisp/rx.el (rx--translate-or): Detect charset arguments.
(rx--charset-p): New.
(rx--translate-not, rx--charset-intervals, rx--translate-union):
Change from `union' to `or'.
(rx--translate-form, rx--builtin-forms, rx): Remove `union'.
* test/lisp/emacs-lisp/rx-tests.el (rx-union, rx-def-in-union)
(rx-intersection): Rename tests and change `union' to `or' and `|'.

* lisp/net/tramp.el (tramp-search-regexp): New defun.
(tramp-check-for-regexp, tramp-process-sentinel):
* lisp/net/tramp-adb.el (tramp-adb-send-command-and-check)
(tramp-adb-wait-for-output):
* lisp/net/tramp-sh.el (tramp-wait-for-output)
(tramp-send-command-and-check):
* lisp/net/tramp-smb.el (tramp-smb-handle-set-file-acl):
Bind search length.

* src/xdisp.c (face_at_pos): Initialize base_face_id to 0
to silence the compiler.

* src/xdisp.c (face_at_pos): Reject the face returned by
'underlying_face_id' when we are filtering by face attribute,
and that attribute's value fails the filter test.  (Bug#38563)

The strings contained in gpg keys can contain UTF-8 data, but can also
use percent-escapes to encode non-ASCII chars.  When converting those
escapes, use 'raw-text' coding system rather than 'string-to-unibyte',
since the latter signals an error for non-ASCII characters.

* lisp/epg.el (epg--decode-percent-escape): Convert the passed
string to raw-text before treating percent escapes (Bug#38512).

Allow placing debug-on-entry on a function not-yet-defined, which
is convenient when the problem you're investigating happens while
the relevant files are loaded.

(font-lock-default-fontify-region): Instead of here.

Needed since we pass the `cl-flet` macro to `eval` in `calculator-funcall`.

(message--old-style-completion-functions): New var.
(message-completion-function): Allow functions on
`message-completion-alist` to follow the capf protocol.
(message-completion-alist): Adjust docstring accordingly.
Simplify regexps and make them apply more liberally.
(message-expand-group): Use the capf protocol.
(completion-category-defaults): Use 'substring' completion style by
default for email addresses.
(message--bbdb-query-with-words, message--name-table): New functions.
(message-expand-name): Use them to obey `message-expand-name-standard-ui`.

Extracted from eudc-expand-inline.
(eudc-expand-inline): Use it.

* src/xfaces.c (face_inherited_attr): Don't infloop if
get_lface_attributes fails in the inner loop.  Reported by
Yuri D'Elia <wavexx@thregr.org>.

* nsterm.m (ns_color_index_to_rgba): Check that we're using a GUI
frame before converting color (Bug#38564).

* lisp/net/tramp-sh.el (tramp-sh-handle-vc-registered):
When called during `revert-buffer', don't spam the echo area and
the *Messages* buffer.

* doc/lispref/internals.texi (Module Values):
Document tv_nsec more accurately.

* src/emacs-module.h.in: Do not include limits.h; no longer needed.
(emacs_limb_t, EMACS_LIMB_MAX): Now size_t and SIZE_MAX.

These character set operations, together with `not' for set
complement, improve the compositionality of rx, and reduce duplication
in complicated cases.  Named character classes are not permitted in
set operations.

* lisp/emacs-lisp/rx.el (rx--translate-any): Split into multiple
functions.
(rx--foldl, rx--parse-any, rx--generate-alt, rx--intervals-to-alt)
(rx--complement-intervals, rx--intersect-intervals)
(rx--union-intervals, rx--charset-intervals, rx--charset-union)
(rx--charset-all, rx--charset-intersection, rx--translate-union)
(rx--translate-intersection): New.
(rx--translate-not, rx--translate-form, rx--builtin-forms, rx):
Add `union' and `intersection'.
* test/lisp/emacs-lisp/rx-tests.el (rx-union ,rx-def-in-union)
(rx-intersection, rx-def-in-intersection): New tests.
* doc/lispref/searching.texi (Rx Constructs):
* etc/NEWS:
Document `union' and `intersection'.

Reinstate some of the functionality removed in commit
67a878f7.

* src/nsimage.m (ns_image_from_XBM): Use new reverseBytes argument.
([EmacsImage initFromXBM:width:height:fg:bg:reverseBytes:]): Add
ability to reverse the contents of each byte for use with XBMs, while
still working with fringe bitmaps.
* src/nsterm.h
([EmacsImage initFromXBM:width:height:fg:bg:reverseBytes:]): Modified
function definition.
* src/nsterm.m (ns_draw_fringe_bitmap): Use new reverseBytes argument.

* lisp/dabbrev.el (dabbrev--check-all-buffers): Add new variable.
(dabbrev-completion): Lexical scoping means we can't use let to
override global variables, so use setq.
(dabbrev--reset-global-variables): Reset new variable.
(dabbrev--make-friend-buffer-list): Use new variable.
* test/lisp/dabbrev-tests.el (dabbrev-completion-test):
(dabbrev-completion-test-with-argument): New tests.

* src/nsterm.m (ns_mouse_position): Implement a search for the frame
under the mouse pointer.

* src/minibuf.c (read_minibuf): Avoid restoring the previous buffer,
as this is already done at the end of the function; call
`add-to-history' after that point.

* lib-src/ebrowse.c (info_where, info_cls, info_member)
(info_position, options, yyival, yytext, yytext_end, yyout)
(yyline, filename, is_ident, is_digit, is_white, f_append)
(f_verbose, f_very_verbose, f_structs, f_regexps)
(f_nested_classes, min_regexp, max_regexp, inbuffer, in)
(inbuffer_size, string_start, class_table, member_table)
(namespace_alias_table, global_symbols, current_namespace)
(all_namespaces, namespace_stack, namespace_stack_size)
(namespace_sp, tk, keyword_table, search_path)
(search_path_tail, scope_buffer, scope_buffer_size)
(scope_buffer_len): Now static.
(options): Now const.

* test/data/themes/faces-test-light-theme.el:
* test/data/themes/faces-test-dark-theme.el: Update accordingly.

* test/lisp/faces-tests.el (faces--test-extend-with-themes):
Don't use the diff-mode faces.  Rename the definitions.

* lisp/faces.el (face-spec-recalc): Handle the :extend attribute
specially and always inherit it from the default spec unless
overwritten in a theme (bug#37774).

* test/lisp/faces-tests.el (faces--test-data-dir): New variable.
(faces--test-extend-with-themes): Use test themes instead of ones
from etc/themes.  Update expected values.

* test/data/themes/faces-test-dark-theme.el: New file.

* test/data/themes/faces-test-light-theme.el: New file.

* doc/lispref/display.texi (Face Attributes):
Update the description of ':extend'.

* etc/NEWS: Update the entry for ':extend'.

* etc/themes/adwaita-theme.el:
* etc/themes/deeper-blue-theme.el:
* etc/themes/dichromacy-theme.el:
* etc/themes/leuven-theme.el:
* etc/themes/light-blue-theme.el:
* etc/themes/manoj-dark-theme.el:
* etc/themes/misterioso-theme.el:
* etc/themes/tango-dark-theme.el:
* etc/themes/tango-theme.el:
* etc/themes/tsdh-dark-theme.el:
* etc/themes/tsdh-light-theme.el:
* etc/themes/wheatgrass-theme.el:
* etc/themes/wombat-theme.el: Remove the now-redundant ':extend'
attribute in all the themes.

This reverts the last change that replaced [remap self-insert-command]
with [t].  The user should have freedom of using any command
in the minibuffer.  (bug#32738)

* doc/lispref/internals.texi (Module Values): Tighten up
wording and code, and make the long example self-contained.
Fit things in margins.

* lisp/progmodes/project.el (project--read-regexp):
Don't rely on the Xref backend to provide the default value.