Raise specific errors for unterminated template literals
Raise specific errors for unterminated template literals

Closes #707

TimothyGu/acorn,TimothyGu/acorn,TimothyGu/acorn,ternjs/acorn,ternjs/acorn,mysticatea/acorn,ternjs/acorn,mysticatea/acorn,marijnh/acorn,mysticatea/acorn,marijnh/acorn,marijnh/acorn