C++ highlighting broken on class template specializations, but only with specific formatting

[evanacox]

With C++, class/struct template declarations break syntax highlighting with template specialization only when there's not an opening brace on the end of the line, and the template is on the same line as struct/class. Does't change when
the C++ extension is enabled/disabled, it's broken on both.

• VSCode Version: 1.50.1
• OS Version: Linux x64 5.8.15-201.fc32.x86_64

Steps to Reproduce:

1. Open up a C++ file in VSCode
2. Paste in the following:

template <class T> struct example;

// highlighting works perfectly fine here
template <> struct example<unsigned> {};

// this also works perfectly fine
template <>
struct example<int> 
{};

// highlighting breaks at <>, doesn't matter if there is anything in it or not. 
// doesn't matter if the specialization is partial, full, CV-qualified, or anything else. 
template <> struct example<long> 
{};

At least on my machine, that text produces the following in a brand new Insiders installation:

Does this issue occur when all extensions are disabled?: Yes/No (Also reproduces on the Insiders build)

[alexr00]

Since we get our c++ syntax highlighting grammar from another repo, I have moved the issue to jeff-hykin/better-cpp-syntax#512