message: fix(changelog): no whitespace when no addition/removal
diff: @@ -146,7 +146,10 @@ export function generate(): string {
  others,
  } = diffTypes(previous, current);
  - const outputs = [writeAddedRemoved(added, removed)];
  + const outputs = [];
  + if (added.size || removed.size) {
  + outputs.push(writeAddedRemoved(added, removed));
  + }
  if (modified.size) {
  const modifiedOutput = [`## Modified\n`];
  for (const [key, value] of modified.entries()) {
  