#181 Documentation String change

[Eric P. Wittmann]

pydev does a nice job of showing the documentation
string for a given method in the intellisense popup in
code completion. However, there is a scenario where I
think it could be tweaked.

Example:
-------

class A:

def foo(self, name):
"foo(string) -> string"
return name

# end A

class B(A):

def foo(self, name):
return "B:%s" % name

# end B

b = B()
b.fo

If I now hit Ctrl-Space to complete the method, I will
not see the "foo(string) -> string" text in the code
completion popup. Seems like if B doesn't specify the
docstring, pydev could look for one on parent classes.
If there are multiple parent classes that both declare
foo(), then either don't show one or pick one.