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Your task is to create a coala native bear, written in pure Python using only coala static analysis.

Read more about native bears in the docs.

This is a 'medium' difficulty issue in the 'bears' project. Here is the issue:

Issue #2434 Python explicit string concatenation bear

Completion of this task requires a merged Pull Request.

Remember to format your Git Commit Message according to the rules, otherwise the bot will tell you to fix it.