Revert "forgot again join conversion"

This reverts commit 6c37a6fef3eb83fd7c7e1baabd702f7e06f9219d.
Revert "forgot join conversion"

This reverts commit 8255518963e82c5e1049e6f3143ca674c72ee180.
Revert " replace split/join by replace in string operations"

This reverts commit 39c4f7d42f380454d88497238b1d972bcbe8e556.
Revert "fixing others join(s) as function parameter"

This reverts commit 71629d8712dd0b7fdc5637a3b039def65479e23e.
Revert "fixing join as function parameter"

This reverts commit ae5a5044fb1b2c92c99bfa7cba9221d376a83a4d.
Revert "remove import string"

This reverts commit 8b9e5903e62870fed638709a4ad17d7e5f6cddce.