This is more likely to be intended as an intra-doc link than it is
to be intended as a refdef. If a refdef is intended, it does not
need to be nested within a list item or quote.
```markdown
- [`LONG_INTRA_DOC_LINK`]: this
looks like an intra-doc link,
but is actually a refdef.
The first line will seem to
disappear when rendered as HTML.
```
