Single `&` is no longer highlighted red.

[aeschli]

From @jamesbellnet on September 4, 2018 9:16

• VSCode Version: 1.26.1
• OS Version: Windows 10

Prior to upgrading VS Code to v1.26.1 (Windows specific version), if I typed the & symbol in body text (in an HTML or PHP file) it would be highlighted in red prompting me to type the correct HTML entity &. Since upgrading to VS Code 1.26.1 it no longer does this.

Things to note:

• I've tried the insiders version, issue is still apparent
• I've searched Google, SO and through the issues on here to no avail
• Disabled all extensions and still same behaviour
• Cannot seem to find a new/changed setting that may be causing this
• I've tried changing colour theme and still no luck

Any help much appreciated.

Does this issue occur when all extensions are disabled?: Yes

Copied from original issue: Microsoft/vscode#57847

[aeschli]

That's done by the HTML text mate grammar, used for syntax highlighting.It looks like the changed this so that it only gets red once the full entity is typed

[infininight]

The grammar has been updated to support the HTML5 spec: It allows for & characters to be used 'bare' provided they don't cause an ambiguous ampersand state. Detailed here in the spec and later in the parsing section.

But in short: & characters are now allowed in raw text unless they are followed by alphanumeric characters and then a ; that does not match a valid named character reference. For this reason the grammar now matches all supported named character references exactly, where before it was a loose match.

cc @jamesbellnet