code: def _expand_tasks(self, scopes):
      
      expanded_scopes = set(scopes)
      for scope, info in self._scope_to_info.items():
        if info.category == ScopeInfo.TASK:
          outer = enclosing_scope(scope)
          while outer != GLOBAL_SCOPE:
            if outer in expanded_scopes:
              expanded_scopes.add(scope)
              break
            outer = enclosing_scope(outer)
      return sorted(expanded_scopes)
docs: Add all tasks in any requested goals.
  
      Returns the requested scopes, plus the added tasks, sorted by scope name.