[docs] Spurios " a " in section 6.9 of Lang Ref Manual.

[Bruce Montague]

Hi, docs at python.org. I'm reporting a minor typo (spurious " a ") in section 6.9 of the Python Language Reference, web page at:

 http://docs.python.org/3.4/reference/expressions.html#index-63


7th paragraph from the bottom of Section 6.9, 3rd sentence:

".for which in tests whether a the dictionary has."   -->   "".for which in tests whether the dictionary has."   


Thanks,

-bruce