== should format bracket block value ==
div {
  prop:  [];
  prop:  [ ];
  prop:  [row1-start];
  prop:  [   row1-start-with-spaces-around   ];
  prop:  [red #fff 12px];
  prop: [row1-start] 25% [row1-end row2-start] 25% [row2-end];
}

[expect]
div {
    prop: [];
    prop: [];
    prop: [row1-start];
    prop: [row1-start-with-spaces-around];
    prop: [red #fff 12px];
    prop: [row1-start] 25% [row1-end row2-start] 25% [row2-end];
}