Reformat all edited locations after multicursor structural edit

[pbwolf]

After a multicursor structural edit, the automatic reformat touches only one of the cursors, and loses the other cursors.

Initial

[(foo
   |bar)
 (foo
   |bar)]

Rewrap {}
Actual

[{foo
  |bar}
 {foo
   bar}]

Expected:

[{foo
  |bar}
 {foo
  |bar}]