Include contents of elpa/ sources + theme update.

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diff --git a/elpa/pdf-tools-20200512.1524/pdf-loader.el b/elpa/pdf-tools-20200512.1524/pdf-loader.el
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+;;; pdf-loader.el --- Minimal PDF Tools loader       -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2017  Andreas Politz
+
+;; Author: Andreas Politz <politza@hochschule-trier.de>
+;; Keywords:
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;
+
+;;; Code:
+
+(defconst pdf-loader--auto-mode-alist-item
+  (copy-sequence "\\.[pP][dD][fF]\\'")
+  "The item used in `auto-mode-alist'.")
+
+(defconst pdf-loader--magic-mode-alist-item
+  (copy-sequence "%PDF")
+  "The item used in`magic-mode-alist'.")
+
+
+(declare-function pdf-tools-install "pdf-tools.el")
+
+;;;###autoload
+(defun pdf-loader-install (&optional no-query-p skip-dependencies-p
+                                     no-error-p force-dependencies-p)
+  "Prepare Emacs for using PDF Tools.
+
+This function acts as a replacement for `pdf-tools-install' and
+makes Emacs load and use PDF Tools as soon as a PDF file is
+opened, but not sooner.
+
+The arguments are passed verbatim to `pdf-tools-install', which
+see."
+  (let ((args (list no-query-p skip-dependencies-p
+                    no-error-p force-dependencies-p)))
+    (if (featurep 'pdf-tools)
+        (apply #'pdf-tools-install args)
+      (pdf-loader--install
+       (lambda ()
+         (apply #'pdf-loader--load args))))))
+
+(defun pdf-loader--load (&rest args)
+  (pdf-loader--uninstall)
+  (save-selected-window
+    (pdf-tools-install args)))
+
+(defun pdf-loader--install (loader)
+  (pdf-loader--uninstall)
+  (push (cons pdf-loader--auto-mode-alist-item loader)
+        auto-mode-alist)
+  (push (cons pdf-loader--magic-mode-alist-item loader)
+        magic-mode-alist))
+
+(defun pdf-loader--uninstall ()
+  (let ((elt (assoc pdf-loader--auto-mode-alist-item
+                    auto-mode-alist)))
+    (when elt
+      (setq auto-mode-alist (remove elt auto-mode-alist))))
+  (let ((elt (assoc pdf-loader--magic-mode-alist-item
+                    magic-mode-alist)))
+    (when elt
+      (setq magic-mode-alist (remove elt magic-mode-alist)))))
+
+(provide 'pdf-loader)
+;;; pdf-loader.el ends here