Fix pygrb skygrid plot (#4888)

* Fix pygrb skygrid plot

* Add plot

* Full stop

bin/pygrb/pycbc_pygrb_plot_skygrid

@@ -70,6 +70,7 @@ trig_file = os.path.abspath(opts.trig_file)
 outfile = opts.output_file
 if opts.plot_title is None:
     opts.plot_title = 'PyGRB sky grid'
+plot_caption = 'Search sky grid points.'
 
 logging.info("Imported and ready to go.")
 
@@ -100,13 +101,15 @@ if opts.verbose:
 
 fig = plt.figure()
 ax = fig.gca()
-ax.set_xlabel(xlabel)#, fontsize=16)
-ax.set_ylabel(ylabel)#, fontsize=16)
+ax.grid()
+ax.set_xlabel(xlabel)
+ax.set_ylabel(ylabel)
 # Trigger RA/Dec data is stored in radians, so convert to degrees
 ax.plot(numpy.rad2deg(trig_data['network/ra']), numpy.rad2deg(trig_data['network/dec']),
         'ko', markerfacecolor='blue')
 # Wrap up
+plt.tight_layout()
 save_fig_with_metadata(fig, outfile, cmd=' '.join(sys.argv),
-                       title=opts.plot_title, caption=opts.plot_caption)
+                       title=opts.plot_title, caption=plot_caption)
                        #fig_kwds=fig_kwds,
 plt.close()