[Tutor] <var:data> assignment

[Alan Gauld]

> Correct because lists are not immutable. Python has a clear
> distinction in the way it handles mutable and imutable data.

Actually as Magnus pointed out it's not really the immutability 
that's the issue here it's the internalisation of short strings 
and low value integers. The fact that they happen to be immutable 
is somewhat orthogonal to the discussion.

However I don't think that minor faux pas changes too much of 
the rest of what I said!

Alan G.