pylint errors addressed

python/mrtrix3/commands/5ttgen/msmt.py

@@ -51,7 +51,7 @@ def __init__(self, inpath, name, expect_anisotropic):
       else:
         app.debug(f'{name} ODF image already on target voxel grid')
       is_anisotropic = len(header.size()) > 3 and header.size()[3] > 1
-      if not (is_anisotropic == expect_anisotropic):
+      if is_anisotropic != expect_anisotropic:
         app.warn(f'Received {"anisotropic" if is_anisotropic else "isotropic"} ODF for {name}'
                  f' but expected {"anisotropic" if expect_anisotropic else "isotropic"};'
                  ' check order of input ODF images if this was not intentional')
@@ -125,4 +125,3 @@ def normalise(self, volsum_image):
     preserve_pipes=True)
 
   return result_masked
-