func EditScriptForStrings(source []rune, target []rune, op Options) EditScript {
	return backtrace(len(source), len(target),
		MatrixForStrings(source, target, op), op)
}
func EditScriptForStrings(source []rune, target []rune, op Options) EditScript {
	return backtrace(len(source), len(target),
		MatrixForStrings(source, target, op), op)
}
func EditScriptForStrings ( source [ ] rune , target [ ] rune , op Options ) EditScript { return backtrace ( len ( source ) , len ( target ) , MatrixForStrings ( source , target , op ) , op ) }
// EditScriptForStrings returns an optimal edit script to turn source into
// target.
EditScriptForStrings returns an optimal edit script to turn source into target .