Issue Type: Bug

Create and save a new .html file. Add a script tag, such as:

<script>
    function main() {
        /**/
    }
</script>

You will notice that after typing the closing slash, IntelliSense pops up (leading to potential unintended insertions if Enter is pressed, for example). If the identical JavaScript code is put into a .js file, the behavior does not occur.

VS Code version: Code 1.45.1 (5763d90, 2020-05-14T08:27:35.169Z)
OS version: Windows_NT x64 10.0.18363