Slide mode to PDF Export fail

To export my slides to pdf, i need to
> Open your presentation with print-pdf included in the query string i.e. http://localhost:8000/?print-pdf. You can test this with revealjs.com?print-pdf.
*from the documentation : [https://github.com/hakimel/reveal.js#pdf-export](https://github.com/hakimel/reveal.js#pdf-export)*

But, when I want to export my slides to PDF, it fails because of the `#` in the hackmd's url.

For exemple, with the slide's url `https://hackmd.io/p/CJY5r0ei4#/`

`https://hackmd.io/p/CJY5r0ei4#?print-pdf` doesn't work 😢
`https://hackmd.io/p/CJY5r0ei4?print-pdf` works 🙌

The best could be to add a "print" button at the bottom of the slides, but maybe delete the `# ` on the url could be a first step ? (Or just add the bug on the documentation for the next users)

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Thanks so much for your work
And sorry for my bad english :s