No change auto-test note

vjekoslav · Jun 22, 2015 · e3ac51c · e3ac51c
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commit e3ac51c
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diff --git a/COOKBOOK-FIXERS.md b/COOKBOOK-FIXERS.md
@@ -155,6 +155,8 @@ fixer does not change what is not supposed to change. Thus:
     ...
 ```
 
+Note that expected outputs are **always** tested alone to ensure your fixer will not change it.
+
 We want to have a failing test to start with, so the test file now looks
 like:
 `Symfony/CS/Tests/Fixer/Contrib/RemoveCommentsFixerTest.php`