error in prepare_manpage.py

[remitamine]

• I've verified and I assure that I'm running youtube-dl 2016.08.07
• At least skimmed through README and most notably FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Bug report (encountered problems with youtube-dl)

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

make
zip --quiet youtube-dl youtube_dl/*.py youtube_dl/*/*.py
zip --quiet --junk-paths youtube-dl youtube_dl/__main__.py
echo '#!/usr/bin/env python' > youtube-dl
cat youtube-dl.zip >> youtube-dl
rm youtube-dl.zip
chmod a+x youtube-dl
COLUMNS=80 /usr/bin/env python youtube_dl/__main__.py --help | /usr/bin/env python devscripts/make_readme.py
/usr/bin/env python devscripts/make_contributing.py README.md CONTRIBUTING.md
pandoc -f markdown -t plain README.md -o README.txt
/usr/bin/env python devscripts/prepare_manpage.py youtube-dl.1.temp.md
Traceback (most recent call last):
  File "devscripts/prepare_manpage.py", line 74, in <module>
    main()
  File "devscripts/prepare_manpage.py", line 39, in main
    readme = filter_options(readme)
  File "devscripts/prepare_manpage.py", line 57, in filter_options
    option, description = re.split(r'\s{2,}', line.lstrip())
ValueError: not enough values to unpack (expected 2, got 1)
make: *** [Makefile:72: youtube-dl.1] Error 1

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Description of your issue, suggested solution and other information

the error is related to:

            if line.lstrip().startswith('-'):
                option, description = re.split(r'\s{2,}', line.lstrip())

when it tries to process this line in README.md:

                                     --max-sleep-interval.

[yan12125]

Thanks. It's my fault that not considering such a case at the first time.