Support markdown input for strikethroughs

[VarLad]

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The Problem

nHeko Reborn supports md, but not strike throughs

The Solution

When typed

Hi, I am ~~not~~ an alien

It should render as Hi, I am ~~not~~ an alien

Alternatives

No response

Additional context

Current state of the problem

Happens in the latest version

• [X] Yes, this feature is still missing.

[deepbluev7]

You can enter <del>not</del> for now at least.

[VarLad]

Thanks for the workaround Although, lets keep the issue open until it gets implemented so others can find the issue and the workaround as well

[LorenDB]

Really, this problem will only be fixed if we switch to a different MD parser; CommonMark isn't going to just add extra features to their reference implementation, which is what we use.

[deepbluev7]

I mean, there is a cmark variant that supports the github extensions, which includes strikethrough (cmark-gfm) or we could just write an extension for cmark ourselves, that we use in addition to the current parser.

[deepbluev7]

Fixed in ec3ba352c0a46b3776b224cb3101619698fa8e26, some limitations apply.

[hiiamboris]

@deepbluev7 for some reason it's not getting rendered in my 0.11.3: