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-rw-r--r--Source/Dafny/DafnyAst.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/Dafny/DafnyAst.cs b/Source/Dafny/DafnyAst.cs
index 69756d76..d923e5dc 100644
--- a/Source/Dafny/DafnyAst.cs
+++ b/Source/Dafny/DafnyAst.cs
@@ -2232,7 +2232,7 @@ namespace Microsoft.Dafny {
switch (op) {
case Opcode.Iff:
- return "==";
+ return "<==>";
case Opcode.Imp:
return "==>";
case Opcode.And: