[Generated Data Name] space in data names create problems

[mathildemerle]

At the generation of a data in medInria toolboxes, we add to the data name " ([name of the process])" beginning with a space each time. Moreover, some toolboxes generate data names with spaces such as PolygonRoi: "mask Label 0 ([original data name])".

These spaces create problem after export in scripts/terminal of users, and some users are annoyed by that.

It would be nice to check if we can avoid some unnecessary spaces.