$17.$ Add Test Cases for first$\_$inside$\_$quotes

When designing test cases for first$\_$inside$\_$quotes, think about how quotes may occur in the string $$ both position and frequency $$ and how that can affect the result.

Your test cases will have to contain double quotes. Remember that $$Hello$$ is not a valid input. Those double quotes are not part of the string. To ensure that the double quotes are part of the string, you may need to use escape characters.