DiffStrings returns the elements in `compareWhat` that are not in `compareTo` and elements in `compareTo` that are not in `compareFrom`.

DiffStringsOneWay returns the elements in `compareWhat` that are not in `compareTo`.

Join concatenates the elements of its first argument to create a single string.

Split slices s into all substrings separated by sep and returns a slice of the substrings between those separators.

SplitN slices s into substrings separated by sep and returns a slice of the substrings between those separators.

Title returns string in Title format.

ToLower returns s with all Unicode letters mapped to their lower case.