Fix/tests and pep8

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• d548ec00 - Passing api tests and code cleanup.

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• 865f5c20 - Fixes creating/updating lines without regions.

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• 37bc9bc5 - versionning tests & pep8.

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• ac12e08d - users tests & pep8.

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unmarked as a Work In Progress

changed title from WIP: Fix/api tests and pep8 to Fix/tests and pep8

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• ae393ef6 - imports tests and pep8.

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merged

mentioned in commit e763589e