Update examples/user_guide/Working_with_Bokeh.ipynb

examples/user_guide/Working_with_Bokeh.ipynb

@@ -99,7 +99,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Note, that the `max_zoom` default is set to 19 for all tile sources; if you need a more detailed map, you can increase this value. However, if the tile source does not support the requested zoom level, the tile source could return a blank map instead, depending on how the tile source handles those requests."
+    "Note, that a `max_zoom` default is set for some tile sources; if you need a more detailed map, and the tile source supports it, you can increase this value. However, if the tile source does not support the requested zoom level, the tile source could return tiles that are empty or tiles that note "map data not yet available", depending on how the tile source handles those requests."
    ]
   },
   {