 
 There are multiple representations of the notebook.
 
-   - @doc      = syncdb version of the notebook (uses SMC sync functionality)
+   - @doc      = syncstring version of the notebook (uses SMC sync functionality)
    - @nb       = the visible view stored in the browser DOM
    - @filename = the .ipynb file on disk
 

                        if err
                            # unable to create syncdoc file -- open in non-sync read-only mode.
                            @readonly = true
                        else
                            @readonly = false
                        #console.log("ipython: readonly=#{@readonly}")
                        cb()
            (cb) =>
                @initialize(cb)

                    cb?()

    _config_doc: () =>
        if @opts.read_only
            cb()
            return
        @dbg("_config_doc")
        # todo -- should check if .ipynb file is newer... ?
        @status("Displaying Jupyter Notebook")
