Parentheses inside strings are parsed as parentheses (cannot submit)

[MatthewScholefield]

When typing a string literal with a single parentheses, the interpreter thinks there are unbalanced parentheses and won't evaluate the expression (it asks for more input).

Example:

λ [3]: "works fine: ()"                                                                                                                                                                        
Out [3]: 
"works fine: ()"

λ [4]: "fails: (" 
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