remove some unicode prefixes

Author: oesteban

nipype/interfaces/ants/registration.py

@@ -1291,7 +1291,7 @@ class MeasureImageSimilarity(ANTSCommand):
     >>> sim.inputs.fixed_image_mask = 'mask.nii'
     >>> sim.inputs.moving_image_mask = 'mask.nii.gz'
     >>> sim.cmdline
-    u'MeasureImageSimilarity --dimensionality 3 --masks ["mask.nii","mask.nii.gz"] \
+    'MeasureImageSimilarity --dimensionality 3 --masks ["mask.nii","mask.nii.gz"] \
 --metric MI["T1.nii","resting.nii",1.0,5,Regular,1.0]'
     """
     _cmd = 'MeasureImageSimilarity'

nipype/interfaces/ants/segmentation.py

@@ -1325,7 +1325,7 @@ class KellyKapowski(ANTSCommand):
     >>> kk.inputs.number_integration_points = 10
     >>> kk.inputs.thickness_prior_estimate = 10
     >>> kk.cmdline
-    u'KellyKapowski --convergence "[45,0.0,10]" \
+    'KellyKapowski --convergence "[45,0.0,10]" \
 --output "[segmentation0_cortical_thickness.nii.gz,segmentation0_warped_white_matter.nii.gz]" \
 --image-dimensionality 3 --gradient-step 0.025000 --number-of-integration-points 10 \
 --segmentation-image "[segmentation0.nii.gz,2,3]" --smoothing-variance 1.000000 \

nipype/interfaces/fsl/model.py

@@ -1862,7 +1862,7 @@ class DualRegression(FSLCommand):
     >>> dual_regression.inputs.n_perm = 10
     >>> dual_regression.inputs.out_dir = "my_output_directory"
     >>> dual_regression.cmdline
-    u'dual_regression allFA.nii 0 -1 10 my_output_directory functional.nii functional2.nii functional3.nii'
+    'dual_regression allFA.nii 0 -1 10 my_output_directory functional.nii functional2.nii functional3.nii'
     >>> dual_regression.run() # doctest: +SKIP
 
     """

nipype/interfaces/tests/test_base.py

@@ -75,7 +75,7 @@ def setup_file(request, tmpdir_factory):
     tmp_dir = tmpdir_factory.mktemp('files')
     tmp_infile = tmp_dir.join('foo.txt')
     with tmp_infile.open('w') as fp:
-        fp.writelines([u'123456789'])
+        fp.writelines(['123456789'])
 
     tmp_dir.chdir()