* lisp/progmodes/sh-script.el (sh-smie-sh-forward-token): Fix infinite
loop (bug#21747).

(sh-indent-after-continuation): Add new value `always' (bug#17620)
(sh-smie-sh-rules): Remove old handling of continued lines.
(sh-smie--indent-continuation): New function.
(sh-set-shell): Use it.

This patch should not change behavior.  It typically omits backslashes
where they are redundant (e.g., in the string literal "^\$").
In a few places, insert backslashes where they make regular
expressions clearer: e.g., replace "^\*" (equivalent to "^*") with
"^\\*", which has the same effect as a regular expression.
Also, use ‘\ %’ instead of ‘\%’ when avoiding confusion with SCCS IDs,
and similarly use ‘\ $’ instead of ‘\$’ when avoiding confusion with
RCS IDs, as that makes it clearer that the backslash is intended.

(sh-here-doc-open-re): Don't mis-match the <<< operator (bug#20683).
(sh-font-lock-quoted-subshell): Make sure double quotes within single
quotes don't mistakenly end prematurely the surrounding string.

Most of these fixes involve escaping grave accents that are
actually intended to be grave accents, not left quotes.
(Bug#20385)

* lisp/vc/log-view.el (log-view-end-of-defun-1):
* lisp/textmodes/tex-mode.el (latex-forward-sexp-1):
* lisp/textmodes/reftex-ref.el (reftex-goto-label):
* lisp/textmodes/bibtex.el (bibtex-insert-kill):
* lisp/progmodes/sh-script.el (sh--maybe-here-document):
* lisp/progmodes/ruby-mode.el (ruby-end-of-defun):
* lisp/progmodes/ada-mode.el (ada-in-numeric-literal-p):
* lisp/org/org.el (org-insert-heading, org-sort-entries):
* lisp/org/org-mouse.el (org-mouse-end-headline)
(org-mouse-context-menu):
* lisp/org/org-clock.el (org-clock-cancel):
* lisp/man.el (Man-default-man-entry):
* lisp/mail/rmail.el (rmail-get-new-mail, rmail-insert-inbox-text)
(rmail-ensure-blank-line):
* lisp/mail/footnote.el (Footnote-delete-footnote):
* lisp/mail/emacsbug.el (report-emacs-bug):
* lisp/info.el (Info-follow-reference, Info-fontify-node):
* lisp/info-look.el (info-lookup-guess-custom-symbol):
* lisp/help-fns.el (help-fns--key-bindings):
* lisp/files.el (hack-local-variables):
* lisp/emulation/viper-ex.el (viper-get-ex-token, ex-cmd-complete)
(viper-get-ex-pat, ex-expand-filsyms, viper-get-ex-file)
(viper-complete-filename-or-exit):
* lisp/emulation/viper-cmd.el (viper-backward-indent):
* lisp/emacs-lisp/lisp-mode.el (calculate-lisp-indent):
* lisp/emacs-lisp/elint.el (elint-get-top-forms):
* lisp/cus-edit.el (custom-face-edit-value-create):
* lisp/calendar/todo-mode.el (todo-set-item-priority)
(todo-filter-items-1, todo-convert-legacy-files)
(todo-prefix-overlays): Add explicit second arg to looking-back.

2a57b7e Fixes: debbugs:18756

Conflicts:
	lisp/ChangeLog

sh-basic-indent-line fix

* lisp/progmodes/sh-script.el (sh-mode): Doc fix.
(sh-basic-indent-line): Handle electric newline.

Run admin/update-copyright.