code: def copy_inner(self, scope):
          
          if self.tokens[1]:
              tokens = [u.copy() if u else u for u in self.tokens[1]]
              out = [p for p in tokens if p]
              utility.rename(out, scope, Block)
              return out
          return None
docs: Copy block contents (properties, inner blocks).
          Renames inner block from current scope.
          Used for mixins.
          args:
              scope (Scope): Current scope
          returns:
              list (block contents)