Single char arguments require special handling here

Also fix betfparam and strongbias arguments

fsl/wrappers/fsl_anat.py

@@ -24,6 +24,7 @@ def fsl_anat(img, out='fsl_anat', **kwargs):
     asrt.assertIsNifti(img)
 
     valmap = {
+        'strongbias' : wutils.SHOW_IF_TRUE,
         'weakbias' : wutils.SHOW_IF_TRUE,
         'noreorient' : wutils.SHOW_IF_TRUE,
         'nocrop' : wutils.SHOW_IF_TRUE,
@@ -33,16 +34,18 @@ def fsl_anat(img, out='fsl_anat', **kwargs):
         'noseg' : wutils.SHOW_IF_TRUE,
         'nosubcortseg' : wutils.SHOW_IF_TRUE,
         'nosearch' : wutils.SHOW_IF_TRUE,
-        'betfparam' : wutils.SHOW_IF_TRUE,
         'nocleanup' : wutils.SHOW_IF_TRUE,
     }
 
     argmap = {
-        'bias_smoothing' : 's',
-        'img_type' : 't',
     }
 
-    cmd  = ['fsl_anat', '-i', img, '-o', out]
+    img_type = kwargs.pop("img_type", "T1")
+    cmd  = ['fsl_anat', '-i', img, '-o', out, '-t', img_type]
+    smoothing = kwargs.pop("bias_smoothing", None)
+    if smoothing is not None:
+        cmd += ['-s', str(smoothing)]
+
     cmd += wutils.applyArgStyle('--=', valmap=valmap, argmap=argmap, singlechar_args=True, **kwargs)
 
     return cmd