STY: Further simplification

Co-authored-by: Chris Markiewicz <[email protected]>

Author: DimitriPapadopoulos

nipype/interfaces/diffusion_toolkit/odf.py

@@ -98,7 +98,8 @@ class HARDIMat(CommandLine):
 
     def _create_gradient_matrix(self, bvecs_file, bvals_file):
         _gradient_matrix_file = "gradient_matrix.txt"
-        bvals = list(re.split(r"\s+", open(bvals_file).readline().strip()))
+        with open(bvals_file) as bvals_f:
+            bvals = bvals_f.readline().strip().split()
         bvecs_f = open(bvecs_file)
         bvecs_x = list(re.split(r"\s+", bvecs_f.readline().strip()))
         bvecs_y = list(re.split(r"\s+", bvecs_f.readline().strip()))