preamble-list-...

# `preamble-list-...`

The `...` header is a correctly formatted comma-separated list.

## Examples

    error[preamble-list-requires]: preamble header list items must begin with a space
      --> input.md:11:13
       |
    11 | requires: 20,1337,2048
       |             ^ missing space
       |                  ^ missing space
       |

## Explanation

The `preamble-list-...` family of lints checks to make sure that front matter (or preamble) fields containing lists are formatted so other tools can understand them.

List items should be separated with a comma and a single space, for example: `this, is, a, list`.