These are dates that admin/update-copyright did not update, or
updated incorrectly.

* doc/misc/epa.texi (GnuPG version compatibility): Make the gpg-agent
description a bit clearer.

* doc/misc/epa.texi (GnuPG version compatibility): New chapter,
describing the differences between three GnuPG branches, and how
to enable pinentry.el.
(Caching Passphrases): Add xref to the compatibility chapter.

These are dates that admin/update-copyright did not update, or
updated incorrectly.

* doc/misc/epa.texi: Fix a typo

The PDF versions of the GNU manuals used curved single quotes to
represent grave accent and apostrophe, which made it a pain to cut
and paste code examples from them.  Fix the PDF versions to use
grave accent and apostrophe for Lisp source code, keystrokes, etc.
This change does not affect the info files, nor does it affect
ordinary uses of curved single quotes in PDF.
* doc/emacs/docstyle.texi: New file, which specifies treatment for
grave accent and apostrophe, as well as the document encoding.
* doc/emacs/emacs-xtra.texi, doc/emacs/emacs.texi:
* doc/lispintro/emacs-lisp-intro.texi:
* doc/lispref/back.texi, doc/lispref/book-spine.texi:
* doc/lispref/elisp.texi, doc/lispref/lay-flat.texi:
* doc/misc/ada-mode.texi, doc/misc/auth.texi:
* doc/misc/autotype.texi, doc/misc/bovine.texi, doc/misc/calc.texi:
* doc/misc/cc-mode.texi, doc/misc/cl.texi, doc/misc/dbus.texi:
* doc/misc/dired-x.texi, doc/misc/ebrowse.texi, doc/misc/ede.texi:
* doc/misc/ediff.texi, doc/misc/edt.texi, doc/misc/efaq-w32.texi:
* doc/misc/efaq.texi, doc/misc/eieio.texi, doc/misc/emacs-gnutls.texi:
* doc/misc/emacs-mime.texi, doc/misc/epa.texi, doc/misc/erc.texi:
* doc/misc/ert.texi, doc/misc/eshell.texi, doc/misc/eudc.texi:
* doc/misc/eww.texi, doc/misc/flymake.texi, doc/misc/forms.texi:
* doc/misc/gnus-coding.texi, doc/misc/gnus-faq.texi:
* doc/misc/gnus.texi, doc/misc/htmlfontify.texi:
* doc/misc/idlwave.texi, doc/misc/ido.texi, doc/misc/info.texi:
* doc/misc/mairix-el.texi, doc/misc/message.texi, doc/misc/mh-e.texi:
* doc/misc/newsticker.texi, doc/misc/nxml-mode.texi:
* doc/misc/octave-mode.texi, doc/misc/org.texi, doc/misc/pcl-cvs.texi:
* doc/misc/pgg.texi, doc/misc/rcirc.texi, doc/misc/reftex.texi:
* doc/misc/remember.texi, doc/misc/sasl.texi, doc/misc/sc.texi:
* doc/misc/semantic.texi, doc/misc/ses.texi, doc/misc/sieve.texi:
* doc/misc/smtpmail.texi, doc/misc/speedbar.texi:
* doc/misc/srecode.texi, doc/misc/todo-mode.texi, doc/misc/tramp.texi:
* doc/misc/url.texi, doc/misc/vhdl-mode.texi, doc/misc/vip.texi:
* doc/misc/viper.texi, doc/misc/widget.texi, doc/misc/wisent.texi:
* doc/misc/woman.texi:
Use it instead of '@documentencoding UTF-8', to lessen the need for
global changes like this in the future.
* doc/emacs/Makefile.in (EMACS_XTRA):
* doc/lispintro/Makefile.in (srcs):
* doc/lispref/Makefile.in (srcs):
Add dependency on docstyle.texi.
* doc/misc/Makefile.in (style): New macro.
(${buildinfodir}/%.info, %.dvi, %.pdf, %.html)
(${buildinfodir}/ccmode.info, ${buildinfodir}/efaq%.info, gnus_deps):
Use it.

These are dates that admin/update-copyright did not update, or
updated incorrectly.  Also, back out the copyright-date change to
doc/misc/texinfo.tex, as upstream hasn't updated that date yet.

This makes no difference to anything, since we always use makeinfo -o,
but it makes automake happier, if we ever decide to use that.

Ref: http://lists.gnu.org/archive/html/bug-texinfo/2014-05/msg00015.html

* doc/misc/ada-mode.texi, doc/misc/auth.texi, doc/misc/calc.texi:
* doc/misc/ebrowse.texi, doc/misc/efaq.texi, doc/misc/emacs-gnutls.texi:
* doc/misc/epa.texi, doc/misc/ert.texi, doc/misc/eshell.texi:
* doc/misc/eww.texi, doc/misc/flymake.texi, doc/misc/gnus.texi:
* doc/misc/info.texi, doc/misc/message.texi, doc/misc/mh-e.texi: 
* doc/misc/newsticker.texi, doc/misc/pcl-cvs.texi, doc/misc/rcirc.texi:
* doc/misc/sem-user.texi, doc/misc/smtpmail.texi, doc/misc/url.texi:
* doc/misc/viper.texi, doc/misc/wisent.texi, doc/misc/woman.texi: 
Use @file for buffers, per the Texinfo manual.