title: Bokeh plot wouldn't show title
body: <p>Trying to plot a graph with Bokeh and the title of the graph wouldn't show.</p>
  <pre><code>import pandas 
  from bokeh.plotting import figure, output_file, show
  
  df=pandas.read_excel(&quot;http://pythonhow.com/data/verlegenhuken.xlsx&quot;,sheet_name=0)
  
  df[&quot;Temperature&quot;]=df[&quot;Temperature&quot;]/10
  df[&quot;Pressure&quot;]=df[&quot;Pressure&quot;]/10
   
  p=figure(plot_width=500,plot_height=400,tools='pan')
  
  p.title.text=&quot;Temperature and Air Pressure&quot;
  p.title.text_color=&quot;Gray&quot;
  p.title.text_font=&quot;arial&quot;
  p.title.text_font_style=&quot;bold&quot;
  p.xaxis.minor_tick_line_color=None
  p.yaxis.minor_tick_line_color=None
  p.xaxis.axis_label=&quot;Temperature (°C)&quot;
  p.yaxis.axis_label=&quot;Pressure (hPa)&quot;  
  
  p.circle(df[&quot;Temperature&quot;],df[&quot;Pressure&quot;],size=0.5)
  output_file(&quot;Weather.html&quot;)
  show(p)
  </code></pre>