README: Add extra-space to keep list consistent

Author: apelisse

README.md

@@ -45,6 +45,7 @@ an existing package to this repository.
 
 - [Clock](/clock) provides an interface for time-based operations.  It allows
   mocking time for testing.
+  
 - [Pointers](/pointers) provides some functions for pointer-based operations.
 
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