Update list_of_ideas.md

list_of_ideas.md

@@ -60,7 +60,7 @@ We are accepting proposals for two projects as part of the Google Summer of Code
 
 **Expected outcomes**: We expect i) the implementation in cloud servers of the DNS and P2P infrastructure for sharing TI and ii) the implementation of Fides and Iris inside Slips. 
 
-## Slips #4  Codebase Enhancement through Unit Testing
+## Slips #4 Codebase Enhancement through Unit Testing
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