equal
Description:
Tests whether two iterators are equal, using the fastest possible mechanism.
This function is very fast; you can expect it to perform better than e.g. getting the character offset for each iterator and comparing the offsets yourself. Also, it’s a bit faster than compare.
Parameters:
| this | a TextIter | 
| rhs | another TextIter | 
Returns:
| true if the iterators point to the same place in the buffer |