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Currently, the formatting we impose on the _LICENSE variable requires that we also use the rarely used := assignment operator, which makes the _LICENSE variable the only variable that users have to write with this operator. This really departs from the simplicity and consistency of using the append-assignment, which we use for every other variable. This is because the append-assignment operator surreptiously introduces a space between the original value and the appended one. But we can use this knowledge, to match any instance of a space followed by a comma, and turn it into a single comma. This allows users to now have a consistent use of the '=' and '+=' operators we use everywhere else in .mk files. Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>