Fix tutorial example "A Slight Modification" - super() takes at least one argument

[meowsqueak]

Documentation error:

http://docs.enthought.com/chaco/user_manual/tutorial_1.html#a-slight-modification

Verbatim copy/paste in Canopy Editor results in:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/Applications/Canopy.app/appdata/canopy-1.1.0.1371.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages/IPython/utils/py3compat.pyc in execfile(fname, *where)
    181             else:
    182                 filename = fname
--> 183             __builtin__.execfile(filename, *where)

.../tutorial1_5.py in ()
     21         self.plot = plot
     22 if __name__ == "__main__":
---> 23     OverlappingPlot().configure_traits()

.../tutorial1_5.py in __init__(self)
     11         width=500, height=500, resizable=True, title="Chaco Plot")
     12     def __init__(self):
---> 13         super(OverlappingPlot).__init__()
     14         x = linspace(-14, 14, 100)
     15         y = x/2 * sin(x)

TypeError: super() takes at least 1 argument (0 given)

Canopy 1.1.0-osx-64 on OSX 10.7.5.

[meowsqueak]

The fix is simple: just add 'self' as the second parameter to the super(...) line:

super(OverlappingPlot, **self**).__init__()

[kjordahl]

This has been fixed in the documentation source for a while: https://github.com/enthought/chaco/blame/master/docs/source/user_manual/chaco_tutorial.rst#L419

Somehow that link is showing an older build (v3.4.1). The current version is here: http://docs.enthought.com/chaco/user_manual/chaco_tutorial.html#multiple-plots

We should clean up the old links on docs.enthought.com.

[jonathanrocher]

Thanks for pointing this out @meowsqueak and @kjordahl. I am adding a review of the documentation on the roadmap for the next few months...