fixes bug found in edf2nx after some time on ID16b
See merge request !126 (merged)
(cherry picked from commit 4c7b75f6)
684dc2cf remove useless print 04a3910c nexus: nxobject: fix: str was not returning a string de6339fe raise an error is scan_range or tomo_n is None (fail to discover .info file) 70c6d5a3 edf2nx: fix computing rotation angle when no key in the header d2947e44 edf2nx: rework rotation angle creation when forced.