Non-empty lines in multiline string interpolations without additional delimiters aren't indented

[AdamNiederer]

tsx-mode doesn't indent any lines within a multi-line string indentation:

`${
0
}`

js-mode and typescript-mode don't indent these cases either, but I'd personally expect it to be indented by one stop, to be consistent with multi-line string interpolations which start with a [, (, or {:

`${
  0
}`

`${(
  0
)}`

`${[
  0
]}`

`${{
  a: 0
}}`