* lisp/nxml/rng-cmpct.el (rng-c-syntax-table):
* lisp/progmodes/cperl-mode.el (cperl-mode-syntax-table)
(cperl-string-syntax-table2):
* lisp/progmodes/dcl-mode.el (dcl-mode-syntax-table): Normalize
definitions to better follow modern ELisp conventions.

Copyright-paperwork-exempt: yes

* lisp/nxml/rng-uri.el (rng-uri-file-name-1): Add missing backslashes.
(rng-uri-unescape-unibyte, rng-uri-unescape-unibyte-match):
Convert hex-encoded character to string.

Don't use this macro any more since it doesn't do anything since Emacs-25
changed the default of `inhibit-point-motion-hooks` to t.

* lisp/nxml/nxml-util.el (nxml-with-invisible-motion): Delete macro.
* lisp/nxml/nxml-mode.el (nxml-mode, nxml-cleanup):
* lisp/nxml/rng-valid.el (rng-do-some-validation):
* lisp/nxml/rng-nxml.el (rng-set-state-after): Don't use it.

* lisp/nxml/rng-util.el (rng-collapse-space): Make obsolete in favor
of 'string-clean-whitespace'.  Update callers.
Suggested by Lars Ingebrigtsen <larsi@gnus.org>.

* lisp/nxml/rng-util.el (rng-blank-p): Make obsolete in favor of
string-blank-p.  Update callers.

This is more robust since timestamps can have multiple forms.
* lisp/auth-source.el (auth-source-netrc-parse):
* lisp/bookmark.el (bookmark--watch-file-already-queried-p)
(bookmark-maybe-load-default-file):
* lisp/cedet/semantic/db.el (semanticdb-needs-refresh-p):
* lisp/dired.el (dired-directory-changed-p):
* lisp/files.el (dir-locals-find-file):
* lisp/gnus/gnus-util.el (gnus-cache-file-contents):
* lisp/gnus/nneething.el (nneething-create-mapping):
* lisp/gnus/nnfolder.el (nnfolder-read-folder):
* lisp/gnus/nnmaildir.el (nnmaildir--update-nov)
(nnmaildir--scan, nnmaildir-request-scan)
(nnmaildir-request-update-info):
* lisp/gnus/nnmh.el (nnmh-update-gnus-unreads):
* lisp/gnus/spam-stat.el (spam-stat-load):
* lisp/mail/mailabbrev.el (mail-abbrevs-sync-aliases):
* lisp/mail/sendmail.el (sendmail-sync-aliases):
* lisp/net/netrc.el (netrc-parse):
* lisp/nxml/rng-loc.el (rng-get-parsed-schema-locating-file):
* lisp/play/cookie1.el (cookie-snarf):
* lisp/vc/vc-cvs.el (vc-cvs-state-heuristic):
* lisp/vc/vc-hg.el (vc-hg--ignore-patterns-valid-p)
(vc-hg--cached-dirstate-search):
* lisp/vc/vc-hooks.el (vc-after-save):
Prefer ‘time-equal-p’ to ‘equal’ when comparing
timestamps for equality.

* lisp/desktop.el (desktop-lazy-idle-delay):
* lisp/files.el (dired-kept-versions)
(kept-old-versions, kept-new-versions):
* lisp/filesets.el (filesets-max-submenu-length)
(filesets-max-entry-length, filesets-tree-max-level)
(filesets-query-user-limit):
* lisp/hi-lock.el (hi-lock-file-patterns-range)
(hi-lock-highlight-range):
* lisp/ido.el (ido-max-work-directory-list):
* lisp/image/gravatar.el (gravatar-cache-ttl):
* lisp/imenu.el (imenu-auto-rescan-maxout, imenu-max-items):
* lisp/informat.el (Info-split-threshold):
* lisp/mail/hashcash.el (hashcash-default-payment)
(hashcash-default-accept-payment):
* lisp/mail/mail-hist.el (mail-hist-history-size):
* lisp/mail/smtpmail.el (smtpmail-retries):
* lisp/msb.el (msb-display-most-recently-used):
* lisp/nxml/rng-valid.el (rng-state-cache-distance)
(rng-validate-chunk-size):
* lisp/progmodes/gdb-mi.el (gdb-max-source-window-count):
* lisp/recentf.el (recentf-arrange-by-rules-min-items):
* lisp/simple.el (kill-ring-max, mark-ring-max)
(global-mark-ring-max):
* lisp/tab-line.el (tab-line-tab-name-truncated-max):
* lisp/term.el (term-buffer-maximum-size, term-input-chunk-size):
* lisp/thumbs.el (thumbs-max-image-number)
(thumbs-thumbsdir-max-size, thumbs-relief, thumbs-margin)
(thumbs-image-resizing-step):
* lisp/type-break.el (type-break-interval)
(type-break-good-rest-interval, type-break-query-interval)
(type-break-warning-repeat):
* lisp/vc/compare-w.el (compare-windows-sync-string-size):
* lisp/woman.el (woman-fill-column): Use defcustom :type natnum.

* lisp/emacs-lisp/backtrace.el (backtrace-line-length):
* lisp/doc-view.el (doc-view-conversion-refresh-interval):
Use defcustom :type natnum and allow the nil value.

* lisp/gnus/spam-stat.el (spam-stat-process-directory-age):
Use defcustom :type integer.

* lisp/nxml/nxml-mode.el (nxml-mode-map):
* lisp/nxml/nxml-outln.el (nxml-outline-prefix-map)
(nxml-outline-show-map, nxml-outline-hiding-tag-map)
(nxml-outline-showing-tag-map): Prefer defvar-keymap.