It would be nice if the filter used to display Markdown files in the source view would render the HTML <strike> tag. I know this isn't supported for security reasons. However, it would still be cool if you could figure out a way to make a small subset of HTML tags work securely.

I have a todo list in the Markdown syntax and when I'm finished with a task I like to mark it as finished by wrapping the item in the <strike> tag.

Example:

:::markdown
    TODO
    ====

    - Item 1
    - Item 2
    - Item 3
    
    FINISHED
    ========

    - <strike>Item 4</strike>
    - <strike>Item 5</strike>
    - <strike>Item 6</strike>