STRING_LITERAL at end of string interpolation

[isomarcte]

Why do we tokenize a string interpolation into the following?

scala> scalariform.lexer.ScalaLexer.tokenise("s\"" + "$" + "{y}\"")
res5: List[scalariform.lexer.Token] = List(Token(INTERPOLATION_ID,s,0,s), Token(STRING_PART,"$,1,"$), Token(LBRACE,{,3,{), Token(VARID,y,4,y), Token(RBRACE,},5,}), Token(STRING_LITERAL,",6,"), Token(EOF,,7,))

Specifically the final STRING_LITERAL doesn't seem to make sense to me. It is always half closed, i.e. doesn't have a leading ". It seems as though it would make more sense to have STRING_PART on both sides.

This is the cause of at least one bug, scalastyle/scalastyle#100.