Replaces the text within the specified bounds with the given characters.
The range of text to replace. The bounds of the range must be valid indices of the string.
The new characters to add to the string.
Calling this method invalidates any existing indices for use with this string.
Complexity: O(m), where m is the combined length of the string and
newElements. If the call to
replaceSubrange(_:with:) simply removes text at the end of the string, the complexity is O(n), where n is equal to