Running formatter produces invalid Swift

[ahoppen]

Formatting this code

_ = [
  Node(
    documentation: """
    A single argument that can be added to a lifetime specifier like `borrow`, `mutate`, `consume` or `copy`.

    ### Example
    `data` in `func foo(data: Array<Item>) -> borrow(data) ComplexReferenceType`
    """,
    children: [
      Child(
        documentation: """
        The parameter on which the lifetime of this type depends. 
        
        This can be an identifier referring to an external parameter name, an integer literal to refer to an unnamed
        parameter or `self` if the type's lifetime depends on the object the method is called on.
        """
      ),
    ]
  )
]

produces

_ = [
  Node(
    documentation: """
      A single argument that can be added to a lifetime specifier like `borrow`, `mutate`, `consume` or `copy`.

      ### Example
      `data` in `func foo(data: Array<Item>) -> borrow(data) ComplexReferenceType`
      """,
    children: [
      Child(
        documentation: """
          The parameter on which the lifetime of this type depends. 
 
         This can be an identifier referring to an external parameter name, an integer literal to refer to an unnamed
          parameter or `self` if the type's lifetime depends on the object the method is called on.
          """
      )
    ]
  )
]

Which is invalid because This can be has insufficient indentation. Instead, the previous line has a single space when it shouldn’t have any.

[ahoppen]

Tracked in Apple’s issue tracker as rdar://123880677

[tristanlabelle]

Possibly related. Before formatting:

After formatting:

[ahoppen]

I think this should be fixed by #1118