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5A. format (;)
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As suggested in chapter 1A, a statement generally stands in its
own line, but several of them may be put together on one line
by separating them with semicolon, or one may be spread over
more than one line by ending each line in a comma ",". Examples:

a:=1; WriteF('hello!\n')
DEF a,b,c,d,                      /* too many args for one line (faked) */
    e,f,g

statements may be:
- assignments
- conditional statements, for statements and the like, (see  5E -5K)
- void expressions
- labels
- assembly instructions

The comma is the primary character to show that you do not wish to
end the statement with the next linefeed, but from v3 on, any token
that cannot legally be the end of a line causes the statement to
continue. Furthermore, if not all "[" and "(" occuring in a statement
have been closed off, a statement will continue also.
examples of such tokens:

+ - * / =
< >= <=
:= . <=> ::
{ [ (
AND OR BUT THEN IS		-> others too, but these are most useful

example of bracketing:

a:=[
    [1,2],
    [3,4]
   ]			-> assignment ends here.