Properly use construct_color_bar() method

notebooks/05_styling.ipynb

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     "See the [Styling plot elements](https://docs.bokeh.org/en/latest/docs/user_guide/styling/plots.html#ug-styling-plots) section of the user guide for more details."
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    "source": [
     "To provide information about what color maps to which numerical value, you can add a\n",
     "color bar to your plot.\n",
     "\n",
-    "To add a color bar, use the ``construct_color_bar()`` method of your glyph. \n",
-    "\n",
     "Adding a color bar is a two-step process:\n",
     "\n",
-    "1. Defining the color bar as a ``ColorBar`` object. Use the `color_mapper`\n",
-    "    parameter to define the color mapper to use. In this case, you use the\n",
-    "    color mapper transform associated with the glyph.\n",
-    "2. Adding the `ColorBar` object to the figure. Use the `add_layout` method to\n",
+    "1. Defining the color bar with the ``construct_color_bar()`` method\n",
+    "2. Adding the color bar to the figure. Use the `add_layout` method to\n",
     "    add the object and define its position."
    ]
   },
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-    "from bokeh.models import ColorBar  # only needed to create a ColorBar directly rather than using construct_color_bar\n",
-    "\n",
     "color_bar = circle_scatter.construct_color_bar()  # create a color bar based on the glyph's color mapper\n",
     "mapper_plot.add_layout(obj=color_bar, place=\"right\")  # add the color bar to the plot you created above\n",
     "\n",
     "show(mapper_plot)"
    ]
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