Array Bignum Binding
Class;
Continuation Dir Exception
FalseClass File Stat File
Fixnum Fload Hash Integer
IO MatchData Method Module
NilClass Numeric Object
Proc Range Regexp String
Struct TMS Symbol ThreadGroup
Thread Time TrueClass

----------------------------------------------------

[
	["builtin", "Array"], ["builtin", "Bignum"], ["builtin", "Binding"],
	["builtin", "Class"], ["punctuation", ";"],
	["builtin", "Continuation"], ["builtin", "Dir"], ["builtin", "Exception"],
	["builtin", "FalseClass"], ["builtin", "File"], ["builtin", "Stat"], ["builtin", "File"],
	["builtin", "Fixnum"], ["builtin", "Fload"], ["builtin", "Hash"], ["builtin", "Integer"],
	["builtin", "IO"], ["builtin", "MatchData"], ["builtin", "Method"], ["builtin", "Module"],
	["builtin", "NilClass"], ["builtin", "Numeric"], ["builtin", "Object"],
	["builtin", "Proc"], ["builtin", "Range"], ["builtin", "Regexp"], ["builtin", "String"],
	["builtin", "Struct"], ["builtin", "TMS"], ["builtin", "Symbol"], ["builtin", "ThreadGroup"],
	["builtin", "Thread"], ["builtin", "Time"], ["builtin", "TrueClass"]
]

----------------------------------------------------

Checks for all builtins.