don't render raw html or data/javascript URLs in crate readmes #310
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Currently, when we render README files for viewing, we leave the output HTML untouched. However, this can lead to some malicious (or at least obstructive) files including
javascript:ordata:URLs which can create security risks.There's an option in
comrak's Markdown renderer to strip out all raw HTML elements andjavascript:/data:URLs when it renders Markdown, so this PR sets that option when rendering README files.