Ruby 3 Upgrade and the `open` method

[kellyeryan]

Hi! My company is upgrading to Ruby 3 from version 2.7.

In 2.7 open checks whether there is a path or url and accommodates based on that check. Ruby 3 has removed that functionality so now it is necessary to do a manual check to prevent breakage. We have some code breaking in our application because of the lost functionality.

Here is where the issue appears in kramdown-converter-pdf. We believe we can fix the issue. We know the repo is unmaintained, but would you accept a patch to fix the problem? Alternatively powerhome could take ownership of the repo and then we could update it ourselves.

[gettalong]

If you provide a patch, I will apply it and release a new version.

[kellyeryan]

Thanks so much! I'll get it done today.

[kellyeryan]

I've tested this code within our application (I monkey patched it in and ran it locally) and it fixes the error we were getting. Is there anything else you'd like me to do to test?