lbracket method
void
lbracket()
Implementation
void lbracket() {
// This is a multi-line string. This special case
// has its own sub-parser.
if (peek(offset: 1).lexeme == '[') {
tokens.add(parseDoubleBracketStr());
return;
}
advanceWithToken(TokenType.kLBracket, lexeme: '[');
}