Run admin/update-copyright.

* lisp/electric.el (electric-quote-comment)
(electric-quote-string, electric-quote-paragraph):
* lisp/epg-config.el (epg-gpgconf-program):
* lisp/rect.el (rectangle-preview):
* lisp/emacs-lisp/check-declare.el (check-declare-ext-errors):
* lisp/emacs-lisp/package.el (package-selected-packages)
(package-hidden-regexps):
* lisp/erc/erc.el (erc-network-hide-list, erc-channel-hide-list):
* lisp/eshell/em-term.el (eshell-destroy-buffer-when-process-dies):
* lisp/gnus/mml-sec.el (mml1991-signers, mml2015-signers)
(mml-smime-signers, mml1991-encrypt-to-self, mml2015-encrypt-to-self)
(mml-smime-encrypt-to-self, mml2015-sign-with-sender)
(mml-smime-sign-with-sender, mml2015-always-trust)
(mml-secure-fail-when-key-problem, mml-secure-key-preferences):
* lisp/net/browse-url.el (browse-url-conkeror-new-window-is-buffer)
(browse-url-conkeror-arguments):
* lisp/net/newst-reader.el (newsticker-download-logos):
* lisp/progmodes/gud.el (gud-guiler-command-name):
* lisp/progmodes/prog-mode.el (prettify-symbols-unprettify-at-point):
* lisp/progmodes/project.el (project-vc):
* lisp/progmodes/python.el (python-indent-guess-indent-offset-verbose)
(python-shell-remote-exec-path, python-shell-first-prompt-hook)
(python-shell-completion-native-disabled-interpreters)
(python-shell-completion-native-enable)
(python-shell-completion-native-output-timeout)
(python-shell-completion-native-try-output-timeout):
* lisp/progmodes/xref.el (xref):
* lisp/term/screen.el (xterm-screen-extra-capabilities):
* lisp/term/xterm.el (xterm-max-cut-length):
Add missing version tags.

Run admin/update-copyright.

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.

Run admin/update-copyright.

(newsticker--icon-read): Use dolist and fix free var error.

* etc/images/newsticker/README: Add rss-feed.png, rss-feed.svg.

* etc/images/newsticker/rss-feed.png: New.

* etc/images/newsticker/rss-feed.svg: New.

* lisp/net/newst-backend.el: Require url-parse.
(newsticker--get-news-by-wget): Store feed name as process property.
(newsticker--sentinel): Read feed name from process property.
(newsticker--sentinel-work): Rename argument name to feed-name.
Rename variable imageurl to image-url.  Pick icon url from Atom
1.0 data.  Launch download of feed icon.
(newsticker--get-icon-url-atom-1.0): New.
(newsticker--unxml)
(newsticker--unxml-node)
(newsticker--unxml-attribute): Documentation.
(newsticker--icons-dir): New.
(newsticker--image-get): New arguments FILENAME and DIRECTORY.
Use `url-retrieve' if `newsticker-retrieval-method' is 'intern.
(newsticker--image-download-by-wget): New.  Use process properties
for storing informations.
(newsticker--image-sentinel): Read informations from process properties.
(newsticker--image-save)
(newsticker--image-remove)
(newsticker--image-download-by-url)
(newsticker--image-download-by-url-callback): New.
(newsticker-opml-export): Handle url list entries containing a
function instead of an url string.

* lisp/net/newst-reader.el (newsticker-html-renderer): Whitespace.
(newsticker--print-extra-elements)
(newsticker--do-print-extra-element): Documentation
(newsticker--image-read): Optionally limit image height.  Use
imagemagick if possible.
(newsticker--icon-read): New.

* lisp/net/newst-treeview.el (newsticker--treeview-item-show): Limit height of feed logo.
(newsticker--treeview-tree-expand): Use feed icons in treeview.
(newsticker--tree-widget-icon-create): New.  Set the tree widget icon.
(newsticker--tree-widget-leaf-icon): Use feed icon.

* lisp/net/newst-backend.el: Remove Time-stamp.  Rename variable
`newsticker--download-logos' to `newsticker-download-logos' and
make it customizable.
(newsticker--sentinel-work): Move xml-workarounds to function
`newsticker--do-xml-workarounds', call unless libxml-parser is
used.  Allow single quote in regexp for encoding.  Use
libxml-parser if available, else fall back to `xml-parse-region'.
Take care of possibly missing namespace prefixes (like "RDF"
instead of "rdf:RDF") when checking xml nodes and attributes (as
libxml correctly removes the prefixes).  Always use Atom 1.0 as
fallback feed type.  Rename `newsticker--download-logos' to
`newsticker-download-logos'
(newsticker--unxml, newsticker--unxml-node)
(newsticker--unxml-attribute): New.
(newsticker--parse-atom-1.0): Call `unxml' in case that embedded
HTML code has become part of the xml parse tree.
(newsticker--parse-rss-1.0, newsticker--parse-rss-2.0): Take care
of possibly missing namespace prefixes.
(newsticker--parse-generic-items): Code formatting. Typo.
(newsticker--images-dir): Add trailing slash.
(newsticker--image-get): Fix error message.

* lisp/net/newst-plainview.el: Remove Time-stamp.

* lisp/net/newst-reader.el: Remove Time-stamp.
(newsticker-download-logos): Rename variable
`newsticker--download-logos' to `newsticker-download-logos' and
make it customizable.
(newsticker--print-extra-elements): Add optional parameter
'htmlish for using html markup.  Amend list of ignored elements.
(newsticker--do-print-extra-element): Add parameter 'htmlish for
using html markup.

* lisp/net/newst-ticker.el: Remove Time-stamp.

* lisp/net/newst-treeview.el (newsticker--treeview-item-show): Use html
for formatting extra elements.

* lisp/net/newsticker.el:  Remove Time-stamp, Version.
(newsticker-version): Make obsolete.

available.  Suggested by Clément B. <barthele1u@etu.univ-lorraine.fr>.