* Displays a message prompt and returns success (0) if first character from stdin
* matches any from acceptableLetters. Otherwise, returns failure (1) and displays abortMsg.
*/
-int UTIL_requireUserConfirmation(const char* const prompt, const char* const abortMsg, const char* const acceptableLetters);
+int UTIL_requireUserConfirmation(const char* prompt, const char* abortMsg, const char* acceptableLetters);
/*-****************************************