FormatOps: handle fewer braces and refined types

[kitbellew]

Fixes #3447.

[tgodzik]

Suggested change

	def f(): Unit =
	List(1, 2, 3).foo: a =>
	a + 2
	.apply:
	12 + 3
	def f(): Unit =
	List(1, 2, 3).foo: a =>
	a + 2
	.apply:
	12 + 3

?

[kitbellew]

it comes from the rule which adds indent to first NL before a dot (so that it's indented relative to the beginning of the full expression), and your proposal will be inconsistent with the formatting so far:

   // short maxColumn
   def f(): Unit =
     List(1, 2, 3).foo(a =>
       a + 2)
       .apply(
         12 + 3)
   // longer maxColumn
   def f(): Unit =
     List(1, 2, 3).foo(a => a + 2)
       .apply(12 + 3)
   // there's no NL before a dot
   def f(): Unit =
     List(1, 2, 3).foo { a =>
       a + 2
     }.apply {
       12 + 3
     }
   // there's a NL before a dot
   def f(): Unit =
     List(1, 2, 3).foo { a =>
       a + 2
     } //
       .apply {
         12 + 3
       }

i didn't like this formatting for fold (no proper unindent before select) and forced NL before the first dot if there's a second select. i could do the same for classic (but not keep).

i could try formatting it like this if you prefer:

   // short maxColumn
   def f(): Unit =
     List(1, 2, 3).foo: a =>
         a + 2
       .apply:
         12 + 3)
   // but, should we still do this?
   def f(): Unit =
     List(1, 2, 3).foo: a =>
       a + 2

[tgodzik]

Ach right, I didn't realize it.

[kitbellew]

slightly modified, tried testing with significant indentation smaller than main indentation, and ran into incorrect parsing problems, so ensure that body is indented relative to subsequent select.

[tgodzik]

LGTM!