Fix typo in notebook.rst
@@ -8,7 +8,7 @@ Working in the Notebook
Inline Plots
------------
-To display Bokeh plots inline in an Jupyter/Zeppelin notebook, use the
+To display Bokeh plots inline in a Jupyter/Zeppelin notebook, use the
|output_notebook| function from |bokeh.io| instead of (or in addition to)
the |output_file| function we have seen previously. No other modifications
are required. When |show| is called, the plot will be displayed inline in
