message: fix(es/codegen): Fix sourcemap bug related to multi-line comments
  swc_ecma_codegen:
  - Compute line starts in multi-line comments.
diff: @@ -184,6 +184,13 @@ impl<'a, W: Write> WriteJs for JsWriter<'a, W> {
  fn write_comment(&mut self, span: Span, s: &str) -> Result {
  self.write(Some(span), s)?;
  + {
  + let line_start_of_s = compute_line_starts(s);
  + if line_start_of_s.len() > 1 {
  + self.line_count = self.line_count + line_start_of_s.len() - 1;
  + self.line_pos = s.len() - line_start_of_s.last().cloned().unwrap_or(0);
  + }
  + }
  Ok(())
  }
  