Update shallowWrapper text method

Added some comments

docs/api/ShallowWrapper/text.md

@@ -2,7 +2,7 @@
 
 Returns a string of the rendered text of the current render tree. This function should be
 looked at with skepticism if being used to test what the actual HTML output of the component
-will be. If that is what you would like to test, use enzyme's `render` function instead.
+will be. If that is what you would like to test, use enzyme's `render` function instead. Adding a simple comment here!
 
 Note: can only be called on a wrapper of a single node.