Lexer doesn't detect function argument types in `Name.Builtin`

[ZackeryRSmith]

When parsing function arguments, the lexer is not correctly identifying if the argument types belong to Name.Builtin.

Steps to Reproduce

• Define a function with argument types that are part of Name.Builtin.
• Run test.py
• Notice that the argument types are assigned as Name.Class (.nc)

Exported HTML with the lexing error (with .nc being RED) is attached to this issue. The HTML had to be uploaded as a txt due to GitHub.

test.txt