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	a/test/expr-brackets.test.expected		b/test/expr-brackets.test.expected
1	FUNCTION func:BOOL;	1	FUNCTION func:BOOL;
2	a := b * ( c + d ) * e;	2	a := b * ( c + d ) * e;
3	a := b * ( (c:=c+1) );	3	a := b * ( (c:=c+1) );
4	a := b * (c:=c+1);	4	a := b * (c:=c+1);
		5
5	END_FUNCTION	6	END_FUNCTION