Returns a new string that is the concatenation the of receiver object's string value with
argument. (See
Section 1.11.2.1, “String Concatenation”.)
The concatenation_operator can be:
""
concatenates without an intervening blank. The abuttal operator
""
is the null string. The language processor uses the abuttal operator to concatenate
two terms that another operator does not separate.
||
concatenates without an intervening blank.
" "
concatenates with one blank between the receiver
object and the argument.
(The operator " " is a blank.)
