fixed up doctest output

Author: tclose

pydra/tasks/dcm2niix/utils.py

@@ -322,7 +322,7 @@ class Dcm2Niix(ShellCommandTask):
     >>> task.inputs.out_dir = "test-data/output"
     >>> task.inputs.compress = "y"
     >>> task.cmdline
-    'dcm2niix -o test-data/output -f \'out_file\' -z y \'test-data/test_dicoms\''
+    "dcm2niix -o test-data/output -f 'out_file' -z y 'test-data/test_dicoms'"
     """
 
     input_spec = Dcm2NiixInputSpec