color formatting issue when parsing a lambda with an explicit return type in C++

[alexr00]

Checklist

• This problem exists even with the setting "C_Cpp.enhancedColorization": "Disabled"

If Disabling that^ makes the problem go away, then follow this to make an issue on the C++ extension:
https://github.com/microsoft/vscode-cpptools/issues/new/choose

The code with a problem is:

void test()
{
  []()->auto{};
}

It looks like:

The semicolon at the end of the lambda expression is colored as if it is a keyword (in my color scheme keywords are blue and the semicolon appears blue as well). It should appear the same color as other punctuation, like commas, operators, etc.
It also causes coloring issues in subsequent lines (keywords are colored as if they are operators and operators are colored as if they are keywords).

The whole auto{}; token is getting the scope storage.type.return-type.lambda.cpp.

It should look like:

Add a whitespace between the return type of the lambda and the body of the lambda.
The following code does not experience this problem:

void test()
{
  []()->auto {}; //note the whitespace between `auto` and `{`
}

Here, the ; is not included in the return-type scope and gets punctuation.terminator.statement.cpp.

Originally posted by @ZamfirYonchev in microsoft/vscode#271277