In the course of creating a whitelist of elements and attributes for LaTex/MathML, I've checked other sources against DOMPurify's lists and found the following issues.

Tags Attributes

• typo: columnsalign should be columnalign
• missing: columnspacing
• incorrect alpha ordering: lquote is currently after lspace

(Edit: they're all attributes, not tags.)

Let me know if you want a PR for all or some of these.