Since some time I have used this to prepend something to a string:
string = ‘bc’
string[0,0] = ‘a’
Then I recently wanted to append something to a string.
Of course there exists the << method already
string = ‘ab’
string << ‘c’
But there does not seem to be a way via 
string[-1,0] = ‘c’
will add at the position before. Is it true that with the
 method on string one can not append just one character to it?