Cherry pick psf#4028.

This keeps two blank lines between the module docstring and the following def/class when there are no other code in between.

Why cherrypick not rebase? Pyink is not yet ready to rebase to Black 23.11.0, I'm waiting for psf#4012 to be merged as Pyink has local patches related to hugging parens.

PiperOrigin-RevId: 582472645

src/pyink/lines.py

@@ -595,6 +595,7 @@ def maybe_empty_lines(self, current_line: Line) -> LinesBlock:
             and self.previous_block.previous_block is None
             and len(self.previous_block.original_line.leaves) == 1
             and self.previous_block.original_line.is_triple_quoted_string
+            and not (current_line.is_class or current_line.is_def)
         ):
             before = 1