**Marked version:** **Describe the bug** A clear and concise description of what the bug is. **To Reproduce** Steps to reproduce the behavior: <!-- If possible, use the Marked Demo permalink and compare to the CommonMark Dingus permalink to demonstrate the bug --> <!-- 1. [Marked Demo](https://marked.js.org/demo/) 2. [CommonMark Demo](https://spec.commonmark.org/dingus/) --> <!-- If you need a specific version and options to reproduce the bug, use the following template --> <!-- 1. Install marked `npm install --save marked@0.3.19` with the version you are using 2. Run marked with input string and options such as `marked('hello *world*', {gfm: true})` 3. Actual output (or error) is... --> **Expected behavior** A clear and concise description of what you expected to happen.