Child Sensitive Production Formatting

[srhickma]

Investigating the changes involved with implementing a formatter that is sensitive to the scopes, etc of child formatting evaluations. It would also be interesting to consider backtracking/sorting traversal in formatting of trees with multiple children.
An example would be the alignment of struct fields in golang:

type SomeStruct struct {
	ID       UserID   `json:"id"`
	Username Username `json:"username"`
	IsActive bool     `json:"isActive"`
}