positive → nonnegative doc fixes

* doc/lispref/numbers.texi (Bitwise Operations)
(Math Functions):
* doc/lispref/strings.texi (Formatting Strings):
* src/editfns.c (Fformat):
Correct “positive” with “nonnegative” in some documentation.

Revert "Make nnimap support IMAP namespaces"

This reverts commit 7b5b3ddb2dfa98d640aff7b5b160f777e22cc794.

Insufficiently tested before committing -- bugs out several places
when not using namespaces.

Add \eqref to RefTeX's reference styles (Bug#32203)

* lisp/textmodes/reftex-vars.el (reftex-ref-style-alist): Add entry
for \eqref provided by amsmath.sty and bind it to "e" key.

Preserve nonblank whitespace when indenting (Bug#32200)

* lisp/indent.el (indent-line-to): Remove only spaces and tabs, not
any whitespace syntax characters.

Add further clarifications to gnus-blocked-images

* lisp/gnus/gnus-art.el (gnus-blocked-images): Add further
clarifications.

Make nnimap support IMAP namespaces

* lisp/gnus/nnimap.el (nnimap-use-namespaces): Introduc new
server variable.
(nnimap-group-to-imap, nnimap-get-groups): Transform IMAP group
names to Gnus group name by stripping / prefixing personal
namespace prefix.
(nnimap-open-connection-1): Ask server for namespaces and store them.

* lisp/gnus/nnimap.el (nnimap-request-group-scan)
(nnimap-request-create-group, nnimap-request-delete-group)
(nnimap-request-rename-group, nnimap-request-move-article)
(nnimap-process-expiry-targets)
(nnimap-request-update-group-status)
(nnimap-request-accept-article, nnimap-request-list)
(nnimap-retrieve-group-data-early, nnimap-change-group)
(nnimap-split-incoming-mail): Use nnimap-group-to-imap.
(nnimap-group-to-imap): New function to map Gnus group names to
IMAP folder names.

Make async :family 'local failures fail correctly again

* src/fileio.c (get_file_errno_data): Refactor out into its own
function so that we can reuse the error handling from an async
context (bug#31901).

* src/process.c (connect_network_socket): When an async :family
'local client fails (with a file error, for instance), mark the
process as failed.

thread-join returns the result of finished thread

* doc/lispref/threads.texi (Basic Thread Functions):
* etc/NEWS: Document return value of `thread-join'.

* src/thread.c (invoke_thread_function, Fmake_thread)
(init_main_thread): Set result.
(Fthread_join): Propagate signals, and return result.
(Vmain_thread): New defvar.

* src/thread.h (struct thread_state): Add `result' field.

* test/src/thread-tests.el (threads-join): Test also return value.
(threads-join-error): New test.
(threads-mutex-signal): Check for propagation of `quit' signal.

Avoid destroying match data in 'setenv' (Bug#32201)

* lisp/env.el (setenv,setenv-internal): Replace string-match with
string-match-p.

Pacify GCC 7 with -Wformat-overflow

* src/w32term.c (x_draw_glyphless_glyph_string_foreground):
Force sprintf to write at most 6 bytes, excluding the
terminating null byte.

Minor rewording of last change

* lisp/vc/add-log.el (add-log-dont-create-changelog-file)
(add-log--pseudo-changelog-buffer-name)
(add-log--changelog-buffer-p, add-change-log-entry): Doc fixes.

* etc/NEWS: Improve wording of last change.

* doc/emacs/maintaining.texi (Change Log Commands): Improve
wording of last change.

New option to make 'C-x 4 a' use file-less ChangeLog buffers

* doc/emacs/maintaining.texi (Change Log Commands): Document
add-log-dont-create-changelog-file.

* etc/NEWS (Change Logs Mode): Mention
add-log-dont-create-changelog-file.

* lisp/vc/add-log.el (add-log-file-name): Add comment.
(add-log-dont-create-changelog-file): New variable.
(add-log--pseudo-changelog-buffer-name)
(add-log--changelog-buffer-p): New helpers.
(add-log-find-changelog-buffer): New function.
(add-log--pseudo-changelog-buffer-name): Respect
add-log-dont-create-changelog-file.

* lisp/vc/log-edit.el (log-edit-changelog-entries): Use
add-log-find-changelog-buffer.

Make ielm accept an optional buffer name param

The ielm buffer name was hardcoded which made it hard for programs to
interactively create ielm buffers with different names and switch to
them (e.g. perhaps you want to have one ielm buffer for each of the
Elisp projects you're working on).

Fix recording keyboard macros when input method is active

* lisp/international/quail.el (quail-start-translation)
(quail-start-conversion): Bind inhibit--record-char to t for
the first character of a translated sequence.

* src/keyboard.c (record_char): Don't record events from
macros to dribble file, per documentation.
(Fopen_dribble_file): Doc fix.
(syms_of_keyboard) <inhibit--record-char>: New variable.
(record_char): Don't record input event if
inhibit--record-char is non-nil.  (Bug#32108)

Report base of out-of-range input fixnums

* src/lread.c (string_to_number): Report the base of an
out-of-range fixnum.  Problem reported by Andy Moreton in:
https://lists.gnu.org/r/emacs-devel/2018-07/msg00696.html

* src/fns.c (Feql, Fequal): Improve floating-point doc.

; Merge from origin/emacs-26

The following commit was skipped:

61de292 (origin/emacs-26) Fix (Bug#32218).  Do not merge with master

Merge from origin/emacs-26

3e72298 Improve documentation of 'pcase-defmacro rx'
ba9b9bb Fix TTY colors breakage by 'clear-face-cache'
f56ad42 * admin/MAINTAINERS: Add files maintained by me (Michael Albi...
7a258fa Adapt shadowfile.el for Tramp  (Bug#4526, Bug#4846)
cb50077 Fix auth-source-delete (Bug#26184)
a4767a6 Avoid assertion violations in gnutls.c
90110f8 Don't use a literal "C-u" in ispell.el  help message text
f4e7f6d Improve documentation of 'seqp'
ed13639 Clarify usage and dependencies between several Flyspell features

Conflicts:
etc/NEWS
test/lisp/auth-source-tests.el

Simplify w32cygwinx.c and pacify GCC (Bug#32189)

* src/w32cygwinx.c (format_string): New function.
(Fw32_battery_status): Use it.

* lisp/net/trampver.el (customize-package-emacs-version-alist):

Add Tramp version integrated in Emacs 26.2.

Fix (Bug#32218).  Do not merge with master

* doc/misc/trampver.texi:
* lisp/net/trampver.el: Change version to "2.3.4.26.2".
(customize-package-emacs-version-alist): Add Tramp version
integrated in Emacs 26.2.

* lisp/net/tramp.el (tramp-handle-file-truename):
* lisp/net/tramp-adb.el (tramp-adb-handle-file-truename):
* lisp/net/tramp-sh.el (tramp-sh-handle-file-truename): Fix problem
with trailing slash.  (Bug#32218)

* test/lisp/net/tramp-tests.el (tramp-test21-file-links):
Remove `tramp--test-emacs27-p' check.

Improve documentation of 'pcase-defmacro rx'

* lisp/emacs-lisp/rx.el (rx): Clarify and improve the doc string.
For the details, see the discussion starting at
http://lists.gnu.org/archive/html/emacs-devel/2018-06/msg00399.html.

Prefer NILP (x) to EQ (x, Qnil)

This simplifies the code a bit, and also simplifies some
potential future changes slightly (e.g., altering eq vs eql).
* src/alloc.c (mark_object):
* src/callint.c (fix_command):
* src/chartab.c (Fchar_table_range, Fset_char_table_range):
* src/dbusbind.c (XD_OBJECT_TO_DBUS_TYPE, xd_signature):
* src/dired.c (Fsystem_users):
* src/fileio.c (Fdo_auto_save):
* src/fns.c (concat):
* src/frame.c (get_frame_param, frame_inhibit_resize)
(store_in_alist, store_frame_param, x_set_autoraise)
(x_set_autolower, x_get_arg):
* src/image.c (Fclear_image_cache):
* src/intervals.c (intervals_equal):
* src/intervals.h (DEFAULT_INTERVAL_P):
* src/lread.c (substitute_object_recurse):
* src/menu.c (digest_single_submenu)
(find_and_call_menu_selection)
(find_and_return_menu_selection):
* src/nsfns.m (x_set_icon_name, Fx_create_frame):
* src/nsmenu.m (ns_menu_show):
* src/nsselect.m (ns_string_to_pasteboard_internal)
(Fns_selection_exists_p, Fns_selection_owner_p):
* src/process.c (Faccept_process_output)
(wait_reading_process_output):
* src/terminal.c (store_terminal_param):
* src/textprop.c (verify_interval_modification):
* src/xdisp.c (next_element_from_buffer):
* src/xfaces.c (Finternal_set_lisp_face_attribute):
* src/xfns.c (x_set_icon_type, Fx_synchronize):
* src/xmenu.c (x_menu_show):
* src/xselect.c (Fx_selection_owner_p)
(Fx_selection_exists_p):
* src/xwidget.c (xwidget_view_lookup):
Prefer NILP (x) to EQ (x, Qnil).

Improve doc for floating point ‘=’ vs ‘eql’

* doc/lispref/numbers.texi (Float Basics, Comparison of Numbers):
Improve documentation of ‘=’ vs ‘eq’, ‘eql’ and ‘equal’
when NaNs and signed zeros are involved.

; * etc/NEWS: Fix confused documentation markers.

The options.el marker was accidentally moved in 2018-07-16
"Improve description of window configs in 'register-val-describe'".

Add 'font-lock-maximum-decoration' levels for Python

* etc/NEWS: New entry under Python mode.

* lisp/progmodes/python.el (python-font-lock-keywords-level-1)
(python-font-lock-keywords-level-2)
(python-font-lock-keywords-maximum-decoration): New variables
based off the incumbent 'python-font-lock-keywords'.
(python-font-lock-keywords): Change it to a list of the new
symbols, for use in the 'car' of 'font-lock-defaults'.
(python-mode): Set the 'car' of 'font-lock-defaults' to the
value of 'python-font-lock-keywords', instead of the symbol
'python-font-lock-keywords'.

Fix TTY colors breakage by 'clear-face-cache'

Without examining the right frame, 'tty-color-24bit' was erroneously
treating a GUI frame as a 24-bit TTY frame.
* lisp/term/tty-colors.el (tty-color-24bit): Accept optional
argument DISPLAY and pass it to display-color-cells.  Doc fix.
(tty-color-define, tty-color-desc): Pass the FRAME argument to
tty-color-24bit.  (Bug#32072)

* etc/NEWS: Fix eql typo in previous change.

* admin/MAINTAINERS: Add files maintained by me (Michael Albinus).

Adapt shadowfile.el for Tramp  (Bug#4526, Bug#4846)

* etc/NEWS: Mention changes in shadowfile.el.

* lisp/shadowfile.el (top): Require 'tramp instead of 'ange-ftp.
(shadow-cluster): New defstruct.
(shadow-make-cluster, shadow-cluster-name, shadow-cluster-primary)
(shadow-cluster-regexp, shadow-get-user)
(shadow-parse-fullname): Remove.
(shadow-info-file, shadow-todo-file, shadow-system-name)
(shadow-homedir, shadow-regexp-superquote, shadow-suffix)
(shadow-set-cluster, shadow-get-cluster, shadow-site-name)
(shadow-name-site, shadow-site-primary, shadow-site-cluster)
(shadow-read-site, shadow-parse-name, shadow-make-fullname)
(shadow-replace-name-component, shadow-local-file)
(shadow-expand-cluster-in-file-name, shadow-contract-file-name)
(shadow-same-site, shadow-file-match, shadow-define-cluster)
(shadow-define-literal-group, shadow-define-regexp-group)
(shadow-make-group, shadow-shadows-of-1, shadow-read-files)
(shadow-write-info-file, shadow-write-todo-file)
(shadow-initialize): Adapt variables and functions.

* test/lisp/shadowfile-tests.el: New file.

* lisp/comint.el: Clean up namespace

(shell-strip-ctrl-m): Mark as obsolete.
(comint-send-invisible): Rename from `send-invisible`.
(send-invisible): Make it an obsolete alias.
* lisp/net/rlogin.el: Adjust accordingly; Use lexical-binding.
* lisp/shell.el: Adjust accordingly.

Fix imenu--generic-function after fix for Bug#32024.

* lisp/imenu.el (imenu--generic-function): Restore returning of nconc
  result from the function.  Move filtering out empty menus so it is
  done before removing dummy element and splicing main element into
  index-alist.

* etc/NEWS: Mention eql etc. NaN fix.

Fix bug with eql etc. on NaNs

Fix a bug where eql, sxhash-eql, memql, and make-hash-table
were not consistent on NaNs.  Likewise for equal,
sxhash-equal, member, and make-hash-table.  Some of these
functions ignored NaN significands, whereas others treated
them as significant.  It's more logical to treat significands
as significant, and this typically makes eql a bit more
efficient on floats, with just one integer comparison instead
of one to three floating-point comparisons.
* doc/lispref/numbers.texi (Float Basics): Document that
NaNs are never numerically equal, but might be eql.
* src/fns.c (WORDS_PER_DOUBLE): Move to top level of this file.
(union double_and_words): Now named, and at the top level of this file.
(same_float): New function.
(Fmemql, Feql, internal_equal, cmpfn_eql): Use it, so that
the corresponding functions treat NaNs consistently.
(sxhash_float): Simplify based on above-mentioned changes.

* test/src/fns-tests.el (fns-tests-equality-nan): New test.

* lisp/net/soap-client.el (soap-type-of): Optimize for Emacs≥26

Remove menu name from emacs-lisp-mode-map (Bug#27114)

* lisp/progmodes/elisp-mode.el (emacs-lisp-mode-map): Don't give a
menu name to the top-level map, the menu name is only useful for the
menu-map.

Fix auth-source-delete (Bug#26184)

* lisp/auth-source.el (auth-source-delete): Fix `auth-source-search'
call.
* test/lisp/auth-source-tests.el (auth-source-delete): New test.

Update from gnulib

This incorporates:
2018-07-17 gnulib-tool: limit line length for git send-email
* lib/gnulib.mk.in: Regenerate.

Avoid assertion violations in gnutls.c

* src/gnutls.c (Fgnutls_hash_digest, gnutls_symmetric)
(Fgnutls_hash_mac): Check CONSP before invoking XCDR.  (Bug#32187)
Report values of invalid arguments when signaling an error.

Update from Gnulib

This causes config.guess to assume support for shell functions,
a safe assumption nowadays.
* build-aux/config.guess, build-aux/config.sub: Copy from Gnulib.

; * etc/NEWS: Mention 'main-thread'.  (Bug#32169)

Add variable main-thread, fix Bug#32169

* doc/lispref/threads.texi (Basic Thread Functions): Add example,
how to propagate signals to the main thread.  Describe variable
`main-thread'.  Document optional argument CLEANUP of
`thread-last-error'.

* src/thread.c (Fthread_last_error): Add optional argument
CLEANUP.  (Bug#32169)
(main-thread): New defvar.

* test/src/thread-tests.el (thread-last-error): Adapt declaration.
(main-thread): Declare.
(threads-main-thread): New test.
(threads-errors): Extend test.

Improve description of window configs in 'register-val-describe'

* etc/NEWS: Describe the change.
* lisp/register.el (register-val-describe)
[(window-configuration-p (car val))]: Include the shown
buffers in the return value to make
'register-read-with-preview' more useful.  (Bug#30863)

* configure.ac [$HAVE_NS]: Correct build instructions.

Running 'make install' to test a repo build on macOS used to
be required, but is no longer needed.

; Remove tracing for epg-tests (Bug#23561)

Reject gpg 2.0 for epg configs by default (Bug#23561)

Previously, gpg2 2.0 would be rejected, but the same version installed
as "gpg" would be accepted.

* lisp/epg-config.el (epg-gpg2-minimum-version): New constant.
(epg-config--program-alist) <OpenPGP>: Require a version in 1.4.3..2.0
or 2.1.6+., not just anything above 1.4.3.
(epg-check-configuration): Accept a list of required version
intervals, in addtion to just a single minimum.

* lisp/format.el (format-proper-list-p): New alias.

; Trace epg-tests (Bug#23561)

Don't test symmetric operations on gpg 2.0 (Bug#23561)

On the Hydra test machines, which have gpg 2.0, the symmetric tests
fail.
* test/lisp/epg-tests.el (with-epg-tests): Pass REQUIRE-PUBLIC-KEY to
`epg-tests-find-usable-gpg-configuration' and call it before
`epg-make-context' so that the latter uses the resulting cached
config.
(epg-tests-find-usable-gpg-configuration): Only allow gpg 2.0 for
symmetric operations.  Clear `epg--configurations' and don't pass
NO-CACHE to `epg-find-configuration'.
(epg-tests--config-program-alist): Use copy-tree to avoid modifying
the epg-config--program-alist cons values.
* test/lisp/emacs-lisp/package-tests.el (package-test-signed): Allow
running with gpg 2.0.

Precise dav/davs in Tramp manual

* doc/misc/tramp.texi (GVFS based methods): Mention `owncloud'
method for special `dav'/`davs' file names.

Fix Bug#32147

* test/lisp/net/secrets-tests.el (secrets-test02-collections)
(secrets-test03-items): Test for both "Login" or "login"
collection.  (Bug#32147)

Update package.el test for message format changes

* test/lisp/emacs-lisp/package-tests.el (package-test-signed): Update
the expected message.  The message was changed in 2018-06-25 "Reformat
package.el message strings for future l10n".
(with-package-test, with-fake-help-buffer): Add debug declarations.

Fix gpg detection for tests (Bug#23561)

* test/lisp/emacs-lisp/package-tests.el (package-test-signed): Stop
using epg-check-configuration and ignore-errors, they're redundant
because epg-find-configuration already does all that.
* test/lisp/epg-tests.el (epg-tests-find-usable-gpg-configuration):
Remove tracing.
(with-epg-tests): Skip test if no gpg config is found.
(epg-decrypt-1 epg-roundtrip-1, epg-sign-verify-1, epg-sign-verify-2)
(epg-import-1): Don't check gpg configuration at top-level, rely on
`with-epg-tests' instead.  Checking the gpg configuration requires a
valid HOME (or GNUPGHOME), which is provided by `with-epg-tests'.

; Trace gpg stderr config output during epg-tests (Bug#23561)

; Further tracing of epg-tests gpg config (Bug#23561)

Don't use a literal "C-u" in ispell.el  help message text

* lisp/textmodes/ispell.el (ispell-command-loop): Use
"\\[universal-argument]" instead of a literal "C-u".  (Bug#32142)

Add to documentation of 'jump-to-register'

* lisp/register.el (jump-to-register):
* doc/emacs/regs.texi (Position Registers): Document that
jumping to a register can push the mark.

; Trace epg-tests gpg config finding (Bug#23561)

Avoid infloop in redisplay due to faulty mode-line properties

* xdisp.c (safe_set_text_properties): New function.
(display_mode_element): Call Fset_text_properties through
internal_condition_case_n, using safe_set_text_properties as a
wrapper.  (Bug#32038)

Improve documentation of 'seqp'

* doc/lispref/sequences.texi (Sequence Functions): Add text to
explain the relation between 'seqp' and 'sequencep'.  (Bug#32125)

Clarify usage and dependencies between several Flyspell features

* lisp/textmodes/flyspell.el (flyspell-region)
(flyspell-small-region, flyspell-persistent-highlight):
Documentation improvements.  (Bug#32142)

* lisp/vc/diff-mode.el (diff-font-lock-prettify): New var

(diff--font-lock-prettify): New function.
(diff-font-lock-keywords): Use it.

Merge from origin/emacs-26

17ebb6e (origin/emacs-26) Use consistent function names in thread-tes...
1c86229 Fix format error in Faccept_process_output
b38b91a Lessen stack consumption in recursive read1
3eb4603 Match w32 paths in grep sans --null hits (Bug#32051)
5cc7c4b Fix previous make-network-process change
d6a1b69 Another documentation improvement in flyspell.el
9b49a8e Improve documentation of Flyspell
3744fda Provide feature 'threads
ef9025f Save the server alias on reconnect (Bug#29657)
db3874b Refer to "proper lists" instead of "true lists"
35e0305 Avoid turning on the global-minor-mode recursively
51bf4e4 Fix Bug#32085

Tweak subr-x.el substring functions

* lisp/emacs-lisp/subr-x.el (string-join): #'-quote function symbol.
(string-trim-left, string-trim-right):
Make better use of substring for minor speedup.
* test/lisp/emacs-lisp/subr-x-tests.el
(subr-x-test-string-trim-left, subr-x-test-string-trim-right)
(subr-x-test-string-remove-prefix)
(subr-x-test-string-remove-suffix): New tests.

Minor cus-theme.el simplifications

* lisp/cus-theme.el (custom-new-theme-mode, customize-themes)
(custom-theme-choose-mode): Use setq-local.
(customize-create-theme): Ditto.  Use delete-all-overlays.
(describe-theme-1, custom-theme-summary): Simplify logic.

Minor custom.el simplifications

* lisp/custom.el (custom-quote): Duplicate macroexp-quote.
(custom-load-symbol, customize-mark-to-save, customize-mark-as-set)
(custom-theme-name-valid-p, enable-theme, custom-enabled-themes)
(disable-theme): Simplify logic.

* lisp/cus-theme.el: Use lexical-binding

* lisp/custom.el: Use lexical-binding

Remove duplicate 'Custom Themes' comment heading.
(deftheme, custom-declare-theme): Fix advertised calling convention.
(custom-enabled-themes): Fix message grammar.

Fix custom-available-themes file expansion

For discussion, see thread starting at
https://lists.gnu.org/archive/html/emacs-devel/2018-05/msg00222.html.
* lisp/custom.el: (custom-available-themes): Use directory-files
instead of performing arbitrary wildcard expansion in file names.
(custom-theme--load-path): Document return value.
* test/lisp/custom-tests.el: New file.
(custom-theme--load-path): New test.

Disable no-byte-compile in built-in themes

* 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/whiteboard-theme.el:
* etc/themes/wombat-theme.el: Disable no-byte-compile.

https://lists.gnu.org/archive/html/emacs-devel/2018-01/msg00614.html
https://lists.gnu.org/archive/html/emacs-devel/2018-02/msg00060.html

Improve loading of byte-compiled custom themes

* lisp/custom.el (load-theme):
Load byte-compiled file of safe themes when available.

https://lists.gnu.org/archive/html/emacs-devel/2018-01/msg00614.html
https://lists.gnu.org/archive/html/emacs-devel/2018-02/msg00060.html

Use consistent function names in thread-tests.el

* test/src/thread-tests.el (threads-call-error, threads-custom)
(threads-errors, threads-sticky-point, threads-signal-early):
Rename, using naming convention to prefix with "threads-".

Fix format error in Faccept_process_output

* src/process.c (Faccept_process_output): Do not use format spec
"%p", it isn't valid for error().

Lessen stack consumption in recursive read1

* src/lread.c (read1): Shrink local buffer size from
MAX_ALLOCA to 128 (Bug#31995).

Match w32 paths in grep sans --null hits (Bug#32051)

* lisp/progmodes/grep.el (grep-regexp-alist): Add an optional part to
match paths starting with C: (other drive letters).
* test/lisp/progmodes/compile-tests.el
(compile-tests--grep-regexp-testcases)
(compile-tests--grep-regexp-tricky-testcases)
(compile-test-grep-regexps): New tests.
(compile--test-error-line): Return `compilation-message'.

Speed up smerge-refine-regions by avoiding fsync

* lisp/vc/smerge-mode.el (smerge-refine-regions): Bind
write-region-inhibit-fsync to t.  This was reported in
https://github.com/magit/magit/pull/2834 to give a noticable speedup.

Don't skip epg-tests even with gpg 2.0 (Bug#23561)

* test/lisp/epg-tests.el (epg-tests--config-program-alist): New
constant, which allows gpg2 version 2.0+.
(epg-tests-find-usable-gpg-configuration): Pass it to
epg-find-configuration.

Fix previous make-network-process change

* src/process.c (Fmake_network_process): On 2018-07-09 "Explicitly
reject :server and :nowait (Bug#31903)", the sense of the SERVER check
was accidentally reversed so that we ended up looking for the wrong
ADDRESS.  Reported by T.V Raman in
<https://lists.gnu.org/archive/html/emacs-devel/2018-07/msg00437.html>.

Another documentation improvement in flyspell.el

* lisp/textmodes/flyspell.el (flyspell-persistent-highlight): Doc
fix.

Improve documentation of Flyspell

For the background, see
http://lists.gnu.org/archive/html/help-gnu-emacs/2018-07/msg00099.html.

* doc/emacs/fixit.texi (Spelling): Add a couple of caveats.
* lisp/textmodes/flyspell.el: Update commentary.

Fix the bootstrap differently, so zerop can be where it belongs

Suggested by Robert Pluim <rpluim@gmail.com>.

* lisp/emacs-lisp/byte-run.el (defun-declarations-alist): Avoid cadr/cddr.
* lisp/subr.el (zerop): Un-revert 2018-07-10T23:08:58-07:00!contovob@tcd.ie.

Provide feature 'threads

* src/thread.c (syms_of_threads): Provide feature "threads".

* test/src/thread-tests.el (top): Declare the functions.
(all): Use (featurep 'threads) check.

; Add commentary on location of zerop

* lisp/subr.el (zerop): Add commentary explaining why moving the
function's location within the file broke bootstrap in
2018-07-10T23:08:58-07:00!contovob@tcd.ie.

Unbreak bootstrap

* lisp/subr.el (zerop): Revert previous change, which caused
bootstrap to fail with void function cadr.

; Rearrange definition of zerop in subr.el

* lisp/subr.el (zerop): Move from under 'List functions' heading to
under 'Basic Lisp functions' heading.

Save the server alias on reconnect (Bug#29657)

rcirc does not retain the server alias on reconnect.  As a result, rcirc
fails to re-use server and channel buffers when an alias is used.  Further
problems may ensue when aliases are used to differentiate multiple
connections to the same host, for example when using a single IRC bouncer
or proxy to connect to multiple IRC networks.

Save the server alias when connecting to a server so that reconnect will
retain the alias.
* lisp/net/rcirc.el (rcirc-connect): Include server-alias when setting
rcirc-connection-info.

Copyright-paperwork-exempt: yes

Refer to "proper lists" instead of "true lists"

* doc/lispref/lists.texi (Cons Cells, Building Lists):
* doc/lispref/sequences.texi (Vector Functions): Use the more
popular term "proper", rather than "true", to qualify nil-terminated
lists.

For discussion, see the following emacs-devel subthreads:
https://lists.gnu.org/archive/html/emacs-devel/2018-06/msg00112.html
https://lists.gnu.org/archive/html/emacs-devel/2018-06/msg00138.html

* lisp/vc/diff-mode.el: Perform hunk refinement from font-lock

Remove redundant :group arguments.
(diff-font-lock-refine): New var.
(diff--refine-hunk): New function, extracted from diff-refine-hunk.
(diff-refine-hunk): Use it.
(diff--font-lock-refine--refresh): New function.
(diff--font-lock-refined): New function.
(diff-font-lock-keywords): Use it.

Fix Bug#32107

* lisp/progmodes/sql.el (sql-buffer-live-p): Fix handling of optional
  connection argument.  (Bug#32107)

Fix infinite recursion in eshell/clear (Bug#31326)

* lisp/eshell/esh-mode.el (eshell/clear): Bind
eshell-input-filter-functions to nil to prevent entries like
eshell-smart-display-setup from causing infinite recursion.

* lisp/indent.el (indent-line-to): Fix dedenting of tabs.

Avoid turning on the global-minor-mode recursively

* lisp/emacs-lisp/easy-mmode.el (define-globalized-minor-mode): Clear
the buffer-list inside MODE-enable-in-buffers to avoid enabling the
mode recursively.  (Bug#31793)

Fix Bug#32085

* doc/misc/tramp.texi (GVFS based methods): `dav' and `davs' do
not support paths in the volume name.  (Bug#32085)

* lisp/format.el (format-annotate-single-property-change): Simplify.

Add predicate proper-list-p

For discussion, see emacs-devel thread starting at
https://lists.gnu.org/archive/html/emacs-devel/2018-04/msg00460.html.

* lisp/subr.el (proper-list-p): New function.
Implementation suggested by Paul Eggert <eggert@cs.ucla.edu> in
https://lists.gnu.org/archive/html/emacs-devel/2018-06/msg00138.html.
* doc/lispref/lists.texi (List Elements):
* etc/NEWS: Document proper-list-p.
* lisp/org/ob-core.el (org-babel-insert-result):
* lisp/emacs-lisp/byte-opt.el (byte-optimize-if):
* lisp/emacs-lisp/cl-macs.el (cl--make-usage-args): Use proper-list-p.
* lisp/emacs-lisp/ert.el (ert--proper-list-p): Remove.
Replaced by proper-list-p in lisp/subr.el.
(ert--explain-equal-rec): Use proper-list-length.
* lisp/format.el (format-proper-list-p): Remove.
Replaced by proper-list-p in lisp/subr.el.
(format-annotate-single-property-change): Use proper-list-p.
* test/lisp/emacs-lisp/ert-tests.el (ert-test-proper-list-p):
Move from here...
* test/lisp/subr-tests.el (subr-tests--proper-list-length):
...to here, mutatis mutandis.

Respect field boundaries in indent-line-to (Bug#32014)

* lisp/indent.el (indent-line-to): Use the back-to-indentation point
as the end-point of whitespace removal, rather than
backward-to-indentation which doesn't respect field boundaries.
* test/lisp/emacs-lisp/lisp-mode-tests.el
(lisp-indent-with-read-only-field): Don't expect to fail.

; Merge from emacs-26

The following commit was skipped:

8f7d35cabd Stop using indent-line-to in lisp-indent-line (Bug#32014)

Merge from emacs-26

db3f779780 ; Test for Bug#32014
90d95b000c Explicitly reject :server and :nowait (Bug#31903)
917158f8c9 Fix Bug#32090

# Conflicts:
# src/process.c

; Merge from emacs-26

The following commit was skipped:

848f0f73e9 Fix floating point exceptions on Alpha (Bug#32086)

Merge from emacs-26

65889a6d12 Fix bootstrap infloop in GNU/Linux alpha
48efd1c98b Minor fix of a recent documentation change
3302b7cd7f Mention the NSM in the gnutls variable doc strings
40c2ce743b Remove test code from last commit
e02d8e29c6 Fix Bug#32084
da5d6dbe39 Fix (length NON-SEQUENCE) documentation