v0.0-558-g7fbda68: Allow 0 spaces around binary operators inside more [] context.
Normally, the formatter pads 1 space around binary operators, but style guidance allows 0 in some contexts for compactness. We limit to 1 space max, and symmetrize the right-side spacing to follow the left-side spacing. You should see formatted results with "[a + b]" and "[a+b]". PiperOrigin-RevId: 329424493