_TOKEN_MATCHERS = [
('keyword', r'(def|do|else|end|if)(?![a-z_])'),
+ ('open_bracket', r'\['),
+ ('close_bracket', r'\]'),
('open_parenthese', r'\('),
('close_parenthese', r'\)'),
('comma', r','),
('integer_literal', r'\d+'),
('symbol', r'[a-z_]+'),
('single_quoted_string_literal', r"'.*?'"),
- ('comparison_level_operator', r'(<=|>=|==|!=|<|>)'),
+ ('comparison_level_operator', r'(<=|>=|==|!=|<|>)'),
('assignment_operator', r'='),
('addition_level_operator', r'(\+|-)'),
('multiplication_level_operator', r'(\*|//|%)'),