message: Use "// MARK:" for code marks
  "#pragma mark" will cause build errors with "-Wunknown-pragmas".
diff: @@ -84,7 +84,7 @@ Schema make_schema()
  }
  -#pragma mark - Sync metadata manager
  +// MARK: - Sync metadata manager
  SyncMetadataManager::SyncMetadataManager(std::string path,
  bool should_encrypt,
  @@ -172,7 +172,7 @@ SyncFileActionMetadataResults SyncMetadataManager::all_pending_actions() const
  return SyncFileActionMetadataResults(std::move(results), std::move(realm), m_file_action_schema);
  }
  -#pragma mark - Sync user metadata
  +// MARK: - Sync user metadata
  SyncUserMetadata::SyncUserMetadata(Schema schema, SharedRealm realm, RowExpr row)
  : m_invalid(row.get_bool(schema.idx_marked_for_removal))
  @@ -304,7 +304,7 @@ void SyncUserMetadata::remove()
  m_realm = nullptr;
  }
  -#pragma mark - File action metadata
  +// MARK: - File action metadata
  util::Optional<SyncFileActionMetadata> SyncFileActionMetadata::metadata_for_path(const std::string& original_name, const SyncMetadataManager& manager)
  {
  