wrote tests for parentheticals
got two of the tests to pass
Update parentheticals() to handle inputs with the same number of parens in the wrong order.
added more test cases
Merge branch 'proper-parenthetics' of https://github.com/jefrailey/data-structures into proper-parenthetics
got final test cases working.
abandoned sum method in favor of simpler test
fixed eol
Update test functions with shorter error message and cleaned up formatting