Square brackets break Emmet in TypeScript files

<!-- ⚠️⚠️ Do Not Delete This! bug_report_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- 🕮 Read our guide about submitting issues: https://github.com/microsoft/vscode/wiki/Submitting-Bugs-and-Suggestions --> <!-- 🔎 Search existing issues to avoid creating duplicates. --> <!-- 🧪 Test using the latest Insiders build to see if your issue has already been fixed: https://code.visualstudio.com/insiders/ --> <!-- 💡 Instead of creating your report here, use 'Report Issue' from the 'Help' menu in VS Code to pre-fill useful information. --> <!-- 🔧 Launch with `code --disable-extensions` to check. --> Does this issue occur when all extensions are disabled?: Yes <!-- 🪓 If you answered No above, use 'Help: Start Extension Bisect' from Command Palette to try to identify the cause. --> <!-- 📣 Issues caused by an extension need to be reported directly to the extension publisher. The 'Help > Report Issue' dialog can assist with this. --> - VS Code Version: 1.71.2 - OS Version: MacOS 12.5.1 Steps to Reproduce: 1. Enable Emmet for TypeScript files, using the `html` language 2. Type a snippet with an attribute, like `a[href]`. Emmet does not expand the snippet. Emmet behaves as expected in HTML files. This feature used to work prior to the VS Code update that came out in mid-May 2022. Video showing unexpected behavior in a TypeScript file: https://user-images.githubusercontent.com/883698/191588848-4f666b06-0d4e-49a1-8ac5-1fc59f34df36.mp4 Video showing expected behavior in an HTML file. https://user-images.githubusercontent.com/883698/191589152-29a0712a-b7c7-49df-9002-0c573fc07680.mp4