Ben Finney authored Mar 07, 2018 and Pierre-Elliott Bécue committed Mar 07, 2018

The phrase “preferred form of modification” does not refer to a form
of the work. It also does not match the GNU GPL's definition of
“source”.

Instead, the GNU GPL (version 3 §1) defines “source code” as the
“preferred form of the work for making modifications to it”.

Ben Finney authored Mar 07, 2018 and Pierre-Elliott Bécue committed Mar 07, 2018

This also removes the now-obsolete translations of the changed text.