Telemb support broken

[pierreganty]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.11.22
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

$ youtube-dl -v "https://www.telemb.be/article/quartiers-dhistoires-le
s-dessous-du-grand-hornu"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.telemb.be/article/quartiers-dhi
stoires-les-dessous-du-grand-hornu']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.11.22
[debug] Python version 2.7.17 (CPython) - Darwin-18.7.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1, rtmpdump 2.4
[debug] Proxy map: {}
[generic] quartiers-dhistoires-les-dessous-du-grand-hornu: Requesting header
WARNING: Falling back on generic information extractor.
[generic] quartiers-dhistoires-les-dessous-du-grand-hornu: Downloading webpage
[generic] quartiers-dhistoires-les-dessous-du-grand-hornu: Extracting informatio
n
ERROR: Unsupported URL: https://www.telemb.be/article/quartiers-dhistoires-les-d
essous-du-grand-hornu
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 2376, i
n _real_extract
    doc = compat_etree_fromstring(webpage.encode('utf-8'))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 2551, in compat_et
ree_fromstring
    doc = _XML(text, parser=etree.XMLParser(target=_TreeBuilder(element_factory=
_element_factory)))
  File "/usr/local/bin/youtube-dl/youtube_dl/compat.py", line 2540, in _XML
    parser.feed(text)
  File "/usr/local/Cellar/python@2/2.7.17/Frameworks/Python.framework/Versions/2
.7/lib/python2.7/xml/etree/ElementTree.py", line 1659, in feed
    self._raiseerror(v)
  File "/usr/local/Cellar/python@2/2.7.17/Frameworks/Python.framework/Versions/2
.7/lib/python2.7/xml/etree/ElementTree.py", line 1523, in _raiseerror
    raise err
ParseError: not well-formed (invalid token): line 6, column 11
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract
_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 530, in
extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 3363, i
n _real_extract
    raise UnsupportedError(url)
UnsupportedError: Unsupported URL: https://www.telemb.be/article/quartiers-dhist
oires-les-dessous-du-grand-hornu

Description

Youtube-dl falls back onto the generic information extraction even though telemb is listed as a supported site.