#2 parser error N1009 gives misleading location

[Marcus Bürgel]

The parser gives a misleading error location if
a '=' instead of a ':=' is written.

(23:0-23:1) : error N1009 : ':=' expected

21 PerspectiveCamera {
22 location = <-4, 4, -7>;
23 up := <0, 1, 0>;
24 }