Whitespace for open curly ('{') after close bracket (']') is removed in function return types

[DanielRosenwasser]

For instance, in the following example where we declare the return type as an array type, we go from

function foo(): blah[] {/**/

to

function foo(): blah[]{
/**/

Notice the lack of whitespace between the blah[] and the {.

[DickvdBrink]

Refs #2628 (duplicate)

[DanielRosenwasser]

Thanks @DickvdBrink!