fixup! Add punctuation

Author: Grégoire Paris

core/jwt.md

@@ -156,7 +156,7 @@ default:
   # ...
 ```
 
-Finally, mark your scenarios with the `@login` annotation to automatically add a valid `Authorization` header and with `@logout` to be sure to destroy the token after this scerario.
+Finally, mark your scenarios with the `@login` annotation to automatically add a valid `Authorization` header, and with `@logout` to be sure to destroy the token after this scerario.
 
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