Revert "préparation invert"

This reverts commit 97af67fcc36b090c47570d40ce53de5b7866fad7.
Revert "Revert "préparation invert""

This reverts commit d3b3ac28997224084a4de21268d03e51d6ebebb3.
Revert "réparation"

This reverts commit f8a3b01db3be2ba5b6c3400929b4faeb95f90ed1, reversing
changes made to 97af67fcc36b090c47570d40ce53de5b7866fad7.