Hal Fulton [mailto:hal9000@hypermetrics.com] expounded:
Perhaps you want
buf += lineto be treated specially for strings.
you read my mind: yes.
But it isn’t… it always means
buf = buf + line
sigh…
and I think you can see there that there is always a new
object created.+= is not a “real” operation… it’s only syntax sugar. It’s not a
method, so it can’t possibly modify an object in place.
Clear enough. Thx.
fwiw, I’ve always thought “+” symbol is common for numeric addition and
string concatenation… Maybe my old (non-o-o) programmg style does not
apply anymore 
…or maybe the syntax sugar is more of a danger than of help…
I’m getting phobia of this “+” thingy…
Does this help any?
Yes, much. Thank you and very kind of you to.
Hal
kind regards -botp