### Summary If you check in Markdown file with a UTF-8 BOM marker, it does not render a YAML header as a code block. ### Steps to reproduce 1. Create a Markdown file with a YAML header 2. Make sure it has a BOM (using Notepad++ for example) 3. Check it in 4. Preview it ### Example Project https://gitlab.com/dmoonfire/gitlab-markdown-bom ### What is the current *bug* behavior? The BOM causes it not to correctly identify the YAML header and format at it. ### What is the expected *correct* behavior? It would treat files with and without BOM identically. ### Relevant logs and/or screenshots With BOM:  Without BOM:  ### Output of checks This bug happens on GitLab.com. ### Possible fixes Sorry.