Bug: Exporting dash to html gives hexadecimal code [8.2.10 (release_8.2.10 @ /usr/share/emacs/24.5/lisp/org/)]

[Roland Coeurjoly <rolandcoeurjoly@gmail.com>]

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I publish (M+x org-publish-project) the following to html:

#+OPTIONS: toc:nil num:nil

#+BEGIN_EXPORT html
---
layout: post
title: "A beginner's Emacs config"
subtitle: "First steps into the Emacs universe"
tags: [hacking, emacs]
category: blog
---
#+END_EXPORT

I get the following:

<div class="export">
<p>
&#x2014;
layout: post
title: "A beginner's Emacs config"
subtitle: "First steps into the Emacs universe"
tags: [hacking, emacs]
category: blog
&#x2014;
</p>

I expect the following:

---
layout: post
title: "A beginner's Emacs config"
subtitle: "First steps into the Emacs universe"
tags: [hacking, emacs]
category: blog
---

I learn that &#x2014 is the hexadecimal code for a dash (-).
As a result of the previously described behaviour, my blog doesn't
display the html. Like a all.

Emacs  : GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
 of 2017-09-20 on lcy01-07, modified by Debian
Package: Org-mode version 8.2.10 (release_8.2.10 @
/usr/share/emacs/24.5/lisp/org/)

current state:
==============
(setq
 org-tab-first-hook '(org-hide-block-toggle-maybe
      org-src-native-tab-command-maybe
      org-babel-hide-result-toggle-maybe
      org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook
  org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-export-show-temporary-export-buffer nil
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-html-format-drawer-function '(lambda (name contents) contents)
 org-latex-format-inlinetask-function 'ignore
 org-confirm-shell-link-function 'yes-or-no-p
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-latex-format-headline-function
'org-latex-format-headline-default-function
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-latex-format-drawer-function '(lambda (name contents) contents)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
     org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
   [org-add-hook change-major-mode-hook org-show-block-all
    append local]
   5]
#[nil "\300\301\302\303\304$\207"
   [org-add-hook change-major-mode-hook
    org-babel-show-result-all append local]
   5]
org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-ascii-format-drawer-function '(lambda (name contents width) contents)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
  org-babel-execute-safely-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
  org-cycle-hide-inline-tasks org-cycle-show-empty-lines
  org-optimize-window-after-visibility-change)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-html-format-headline-function 'ignore
 org-html-format-inlinetask-function 'ignore
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-publish-project-alist '(("https://rcoeurjoly.github.io/posts"
      :base-directory
      "~/RCoeurjoly.github.io/_org/posts"
      :base-extension "org" :publishing-directory
      "~/RCoeurjoly.github.io/_posts" :recursive t
      :publishing-function org-html-publish-to-html
      :headline-levels 4 :html-extension "html"
      :body-only t)
     )
 )

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