Use brace_style for closures with blocks

[Iron-E]

Closures with blocks don't adhere to brace_style. For example, when brace_style = "AlwaysNextLine", a closure with a block will look like this:

foo.ok_or_else(|| {
  // closure
})

It should be:

foo.ok_or_else(|| 
{
  // closure
})

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Originally posted by me in #3376 (comment)

[calebcartwright]

Closing as per #4938 (comment)