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-rw-r--r--etc/isar/trace_simp.thy1
1 files changed, 1 insertions, 0 deletions
diff --git a/etc/isar/trace_simp.thy b/etc/isar/trace_simp.thy
index 430d37f5..55d46189 100644
--- a/etc/isar/trace_simp.thy
+++ b/etc/isar/trace_simp.thy
@@ -1,3 +1,4 @@
+(* This is a test of tracing output for Isabelle. *)
theory trace_simp = Main: