Function dedent

lib/codemirror/mode/python/python.js:238–245

(stream, state)

    }

    function dedent(stream, state) {
      var indented = stream.indentation();
      while (top(state).offset > indented) {
        if (top(state).type != "py") return true;
        state.scopes.pop();
      }
      return top(state).offset != indented;
    }

    function tokenLexer(stream, state) {
      var style = state.tokenize(stream, state);