micromark.js: unquoted: is `completeAttributeValueUnquoted`s case for `completeAttributeNameAfter` missing a `/`?. I’ve added it here.
micromark.js: `]` case in cdata_end does not need to consume, it can defer to `cdata_close`, which should save 1 line
micromark.js: should `tagOpenAttributeValueUnquoted` also support a slash?
micromark.js: `atLineEnding` in html (text) should always eat arbitrary whitespace? code (indented) has no effect on html (text)?

```rs
// ---------------------
// Useful helper:
extern crate std;
use std::println;
use alloc::string::String;

    let mut index = 0;
    let mut balance = 0;
    println!("before: {:?}", tokenizer.events.len());
    while index < tokenizer.events.len() {
        let event = &tokenizer.events[index];
        if event.kind == Kind::Exit {
            balance -= 1;
        }
        let prefix = String::from_utf8(vec![b' '; balance * 2]).unwrap();
        println!(
            "ev:  {}{:?}:{:?} ({:?}): {:?}",
            prefix, event.kind, event.name, index, event.link,
        );
        if event.kind == Kind::Enter {
            balance += 1;
        }
        index += 1;
    }
```