`no-unused-disable` does not work within Markdown files

[ehmicky]

README.md:

<!-- eslint-disable no-inline-comments -->

```js
var aa = true
```

.eslintrc.yml:

plugins:
  - eslint-comments
  - markdown
rules:
  no-inline-comments: 2
  eslint-comments/no-unused-disable: 2

In the terminal:

$ eslint README.md

The command does not report any errors. However no-unused-disable should be reported.

Versions:

• eslint: 5.16.0 (also fails with 6.0.0-alpha.0)
• eslint-plugin-eslint-comments: 3.1.1
• eslint-plugin-markdown: 1.0.0

I am not sure whether the issue comes from eslint-plugin-eslint-comments or eslint-plugin-markdown, so I decided to report this bug here.

[mysticatea]

Thank you for this report.

eslint-comments/no-unused-disable is the alias of --report-unused-disable-directives option.

The markdown plugin seems to handle the HTML comments in a different way from ESLint core, so the rule doesn't recognize the HTML comments. So this is not a bug, but an enhancement.

[ehmicky]

Thanks for your answer, you're right. Now I know eslint-plugin-markdown is the problem, not eslint-plugin-eslint-comments. I've added an issue to their repository.