Inputs are too flexible for delimited lists/arrays and strings

[yee-luna-c]

...allowing for any bracketing (paren and square; interior and exterior) and any exterior (combination of) quotation marks. String issue applies to variable bank and solution box; list/array issue applies to solution box only.

See commit d5ed79a for locations of string flexibility in variable bank and d4a79d5 for string flexibility in solution box. Note that a fix will mean no change will be necessary on the correctValue/correctSolution, as that is already stripped of quotes (but note that correctSolution is partly dependent on create_print_output in tplHelper.js). Bracket flexibility is above solution box flexibility for string.