header link in github flavored markdown mode.

[computerphilosopher]

Bug Report

Steps to reproduce

set 'gfm' attribute to true and make a header link that has a hyphen('-') in it.

What is current behaviour

I have to write in this way

# link to  'part1 - my title'   
[my header link](part1-my-title)

What is the expected behaviour

but when I make header link in github, I have to write in this way.

# link to  'part1 - my title'   
[my header link](part1---my-title)

I think link text should be same as github because I set gfm mode to true.

I reported a issue to markedjs first.

they said new release of docsify could fix this issue.

markedjs was updated in version 4.10.2 but nothing changed.

so I think it is docsify's issue.

Other relevant information

• [x] Bug does still occur when all/other plugins are disabled?

• Your OS: MacOS Mojave 10.14.16

• Node.js version: 13.1.0

• npm/yarn version: npm 6.12.1

• Browser version: safari 13.0.4

• Docsify version: 4.10.2(docsify) 4.4.0(docsify-cli)

• Docsify plugins:

  <script src="//unpkg.com/prismjs/components/prism-bash.min.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-c.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-cpp.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-java.js"></script>
  <script src="//unpkg.com/docsify-copy-code"></script>
  <script src="https://cdn.jsdelivr.net/npm/docsify-themeable@0"></script>

[trusktr]

We'll need to investigate this.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[nawed2611]

Hey! Can I work on this?