style: Update Arrays 4.7 to add best style rule

[umairx97]

Closes #2187

[ljharb]

I'm not sure this adds any value to this particular rule; that we're using simple logic here for the sake of examples isn't really material. Pretend that each return value is 10 statements, and it can't be collapsed into a single expression.

[umairx97]

The example I added was on the assumption of the good case rule where there are just two conditions to be checked

[ljharb]

and in the case of this specific code, I agree your "best" is better :-) however, adding that would be irrelevant to demonstrating the point of this section in the guide, which is to talk about array callback return patterns.

[umairx97]

so would you consider adding this to this section ?
inbox.filter(({ subject, author }) => subject === 'Mockingbird' && author === 'Harper Lee';

as it is implicit return pattern
if Yes I can just push new changes to the PR :)

[ljharb]

I'm not convinced its presence would be helpful; i think it would distract from the purpose of the section.

[umairx97]

Oh okay, understandable