roundtripping escapes before emphasis causes emphasis to be lost

[ChristianMurphy]

Subject of the issue

\\\\*text*

is stringified as:

\\\*text*

which changes the structure

Your environment

• OS: Ubuntu
• Packages: mdast-util-to-markdown 0.6.4
• Env: node v15.5.1, npm 7.3.0

Steps to reproduce

parse

\\\\*text*

which has the structure

{
    "type": "root",
    "children": [
        {
            "type": "paragraph",
            "children": [
                {
                    "type": "text"
                },
                {
                    "type": "emphasis",
                    "children": [
                        {
                            "type": "text"
                        }
                    ]
                }
            ]
        }
    ]
}

and stringify it:

\\\*text*

the resulting markdown has a different structure than the original

{
    "type": "root",
    "children": [
        {
            "type": "paragraph",
            "children": [
                {
                    "type": "text"
                }
            ]
        }
    ]
}

📓 comparing how the two pieces of markdown text are being parsed with https://spec.commonmark.org/dingus it appears in both cases it is parsed as expected.

Expected behavior

structure is the same

Actual behavior

structure is different

[wooorm]

Wasn't that fixed just now? 🤔

[ChristianMurphy]

#14 was emphasis becoming text, this is text becoming emphasis.
I double checked and this is seen with version 0.6.4

[ChristianMurphy]

This can also happen with code

\\\\`code`

and with HTML

\\\\<div>

also with links:

\\\\[]()