> 1. Since we are exiting after any problems with memory allocation, does that mean we do not need to realloc() to a temporary variable first, check for NULL, and then assign that temporary variable to our main variable? Or should we do it as good practice anyway?

> 2. Do we have to dynamically allocate memory for the char array that stores every line of the source file while copying, or is it possible to use a constant here? (I think I saw BUFSIZ somewhere?).