fix: omit indentation from text block assignments

[jtkiesel]

What changed with this PR:

Text blocks are no longer indented when used as the value of an assignment expression. Prettier JS/TS doesn't have an equivalent to Java text blocks, where we can choose a level of indentation but cannot change the difference in indentation between the closing """ and the least-indented line. I've decided to align their formatting with that of method invocations or other parenthesized expressions, except that the contents can't have their indentation changed WRT the closing """ (or else the multiline string will be altered). I'm not absolutely sold on this way of formatting them, but I think it's a bit better than what is currently in main.

Example

Input

String source = """
  public void print(%s object) {
      System.out.println(Objects.toString(object));
  }
  """.formatted(
  aaaaaaaaaa,
  bbbbbbbbbb,
  cccccccccc,
  dddddddddd,
  eeeeeeeeee,
  ffffffffff
);

Output

String source = """
public void print(%s object) {
    System.out.println(Objects.toString(object));
}
""".formatted(
  aaaaaaaaaa,
  bbbbbbbbbb,
  cccccccccc,
  dddddddddd,
  eeeeeeeeee,
  ffffffffff
);

Relative issues or prs:

Closes #977