Put units into descr.

Author: chrisgorgo

nipype/interfaces/fsl/maths.py

@@ -143,9 +143,9 @@ class MaxImage(MathsCommand):
 class IsotropicSmoothInput(MathsInput):
 
     fwhm = traits.Float(mandatory=True, xor=["sigma"], position=4, argstr="-s %.5f",
-                        desc="fwhm of smoothing kernel")
+                        desc="fwhm of smoothing kernel [mm]")
     sigma = traits.Float(mandatory=True, xor=["fwhm"], position=4, argstr="-s %.5f",
-                         desc="sigma of smoothing kernel")
+                         desc="sigma of smoothing kernel [mm]")
 
 
 class IsotropicSmooth(MathsCommand):