practice using test cases to debug a function. this is the same function we developed earlier in the iterative development lesson. it is a function that takes as arguments a string and a list of strings, and returns the a list of indices where the first string was found in the list. it is to be case insensitive and handle partial words as well. check back in 5.2 for a more complete definition. find the error in this version of that code and fix it.