Update segmentation.py

split temp_tck path to generate relative path instead of absolute path

AFQ/tasks/segmentation.py

@@ -67,8 +67,8 @@ def segment(data_imap, mapping_imap,
         tg = trx.to_sft()
     elif streamlines.endswith(".tck.gz"):
         # uncompress tck.gz to a temporary tck:
-        temp_tck = op.join(mkdtemp(), streamlines.replace(".gz", ""))
-        print(temp_tck)
+        temp_tck = op.join(mkdtemp(), op.split(streamlines.replace(".gz", ""))[1])
+        logger.info(f"Temporary tck file created at: {temp_tck}")
         with gzip.open(streamlines, 'rb') as f_in:
             with open(temp_tck, 'wb') as f_out:
                 shutil.copyfileobj(f_in, f_out)