In the "Arguments in Component Lifecycle Hooks" section, changed the After example for `didReceiveAttrs` to better match the Before example, and more importantly, to show the manual saving of any properties one might want to compare old values and new values of during `didReceiveAttrs`. Addresses #2862
In the "Arguments in Component Lifecycle Hooks" section, changed the After example for `didReceiveAttrs` to better match the Before example, and more importantly, to show the manual saving of any properties one might want to compare old values and new values of during `didReceiveAttrs`. Addresses #2862

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