Wed, 20 Jan 2016 14:32:56 +0100 wenzelm tuned signature (according to Scala version);
Wed, 20 Jan 2016 18:04:41 +0100 blanchet fixed NEWS w.r.t. multisets
Wed, 20 Jan 2016 17:14:53 +0100 blanchet added 'supset' variants for new '<#' etc. symbols on multisets
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