fix typo ✍

reflection.md

@@ -702,7 +702,7 @@ How do you feel right now? It felt like maybe a nice abstraction at the time but
 
 _This is OK!_ Refactoring is a journey and sometimes we will make mistakes. A major point of TDD is it gives us the freedom to try these things out.
 
-By taking small steps backed by steps this is in no way an irreversible situation. Let's just put it back to how it was before the refactor.
+By taking small steps backed by tests this is in no way an irreversible situation. Let's just put it back to how it was before the refactor.
 
 ```go
 func walk(x interface{}, fn func(input string)) {