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Merge list extend

Sourcery refactoring id: merge-list-extend

Description:

Create the list with values instead of creating an empty list and extending it with another list

Before:

hats_i_own = []
hats_i_own.extend(['panama, baseball_cap, bowler'])

After:

hats_i_own = ['panama', 'baseball_cap', 'bowler']

Explanation:

When declaring a list with values it is much clearer to do so on one line rather than declaring an empty list and then extending it with values.

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