fix code example for generating reducers

[seriousManual]

No description provided.

[timdorr]

Thanks!

[markerikson]

FWIW, the existing example was valid. It's an ES6 object literal, with a computed key as the function name, and a function declaration directly as part of the object.

Admittedly not the easiest thing to read, but it was valid.

[timdorr]

Ah, I didn't know you could combine those two, but that makes sense.

[seriousManual]

wow, didn't know this!
thanks for the clarification, with the added colon and fat arrow the readability might a bit better though :)