BasicFormat indents closure parameter

```
func testClosureParam() {
var input = Parser("""
foo(someClosure: { _ in
return 1
})
""")
let call = ExprSyntax.parse(from: &input)

let formatted = call.formatted()
assertStringsEqualWithDiff(formatted.description, """
foo(someClosure: { _ in
return 1
})
""")
}
```

Produces:
```
failed - Actual output (+) differed from expected output (-):
–foo(someClosure: { _ in
– return 1
–})
+foo(someClosure: { _ in
+ return 1
+ })
```

Note the double indent on `return 1` and indent of `}`. Presumably we're always indenting on newlines within parameters of call expressions and then again from the code block.