Replaces a range of characters with the given text.

Parameters:

start		The starting index in the range, inclusive. This must be >= 0 and < the end.
end		The ending index in the range, exclusive. This is one-past the last character to delete (consistent with the String manipulation methods). This must be > the start, and <= the length of the text.
text		The text that is to replace the range. This must not be null.