Merge commit 'df5c5f5'

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diff --git a/Test/triggers/set-construction-is-a-good-trigger.dfy b/Test/triggers/set-construction-is-a-good-trigger.dfy
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+++ b/Test/triggers/set-construction-is-a-good-trigger.dfy
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+// RUN: %dafny /compile:0 /print:"%t.print" /dprint:"%t.dprint" /autoTriggers:1 /printTooltips "%s" > "%t"

+// RUN: %diff "%s.expect" "%t"

+

+// This file ensures that display expressions can be picked as triggers. This is

+// useful for code that checks if a set, sequence, or multiset is a singleton.

+

+method M(s: seq<int>, st: set<int>, mst: multiset<int>)

+  requires exists y :: s == [y]           // Seq#Build(Seq#Empty(): Seq Box, $Box(y#3))

+  requires exists y :: st == {y}          // Set#UnionOne(Set#Empty(): Set Box, $Box(y#4))

+  requires exists y :: mst == multiset{y} // MultiSet#UnionOne(MultiSet#Empty(): MultiSet Box, $Box(y#5))

+{

+}