Bugfix: The stage files should not begin with "-".

Bugfix: The stage files should not begin with "-".

I haven't looked at the stage files in a while because it just works.
I happened to notice that they are beginning with "-".
This is incorrect.

Turns out that at some point in time the separator got pulled outside the process.used condition.
This results in the "-" always being added when it should not be.
The problem is introduced in this completely erroneous commit 8cb1d765b75403e242e307590842628aad7ad91b.

Add the same logic check to the name because it also append a "-".

Also reset the used length at the start of population of the stage file strings.