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Fixes #389

Older git versions defaults to 7 chars.

This reverts commit d31bbb1c, reversing
changes made to 340ab3cb.

This reverts merge request !309

Also fix some warning in the code and add a missing alias

Works on my computer ^TM

It's twice as fast and will be the standard in the coming ecto.

It recompiled too often and tested too long.