diff --git a/Programming-Guide.md b/Programming-Guide.md
index 98aa260..23b0890 100644
--- a/Programming-Guide.md
+++ b/Programming-Guide.md
@@ -167,5 +167,5 @@ Ctx.INSTANCE.removeListener(temperatureKey, display);
 
 Ctx.INSTANCE.put(temperatureKey, 30); // no notification after listener removed
 ```
-
+---
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