Fix title retrieval in page function.

[PhoenixCreation]

Problem

• wikipedia.summary() raises error on common words if auto_suggest is set to True(which is by default).
• Also see #284, #279, #266 for more details.
• In simple words if you use wikipedia.summary("loki") then it will raise wikipedia.exceptions.DisambiguationError: "lok" may refer to: . Which suggests that it is searching for lok instead of loki.

Cause of Problem

• When calling the summary function, it calls the page function. where is auto_suggest is true then we try to check for the valid title through search function which return the results and suggestion.
• But while assigning the title variable title = suggestion or results[0] like this we are applying the suggestion first and if suggestion not found then result. Which causes this problem.
• Actually title = results[0] or suggestion should be used which means set title to results[0] first and if results[0] is not available then set it to suggestion.

Changes

• At file wikipedia/wikipedia.py line 272

- suggestion or results[0]
+ results[0] or suggestion

Fixes

• #284
• #279
• #266

[wlerin]

If results[0] is not available this will throw an IndexError, not set title to suggestion.