minor improvements on doctests

Author: oesteban

nipype/interfaces/fsl/utils.py

@@ -157,31 +157,35 @@ class Smooth(FSLCommand):
     """
     Use fslmaths to smooth the image
 
-    Example
-    -------
-
-    >>> from nipype.interfaces.fsl import Smooth
-    >>> sm = Smooth()
-    >>> sm.inputs.in_file = 'functional2.nii'
-    >>> sm.cmdline
-    Traceback (most recent call last):
-     ...
-    RuntimeError: either sigma (in mm) or fwhm need be specified.
+    Examples
+    --------
 
     Setting the kernel width using sigma:
+
     >>> sm = Smooth()
     >>> sm.inputs.in_file = 'functional2.nii'
     >>> sm.inputs.sigma = 8.0
     >>> sm.cmdline #doctest: +ELLIPSIS
     'fslmaths functional2.nii -kernel gauss 8.000 -fmean functional2_smooth.nii.gz'
 
     Setting the kernel width using fwhm:
+
     >>> sm = Smooth()
     >>> sm.inputs.in_file = 'functional2.nii'
     >>> sm.inputs.fwhm = 8.0
     >>> sm.cmdline #doctest: +ELLIPSIS
     'fslmaths functional2.nii -kernel gauss 3.397 -fmean functional2_smooth.nii.gz'
 
+    One of sigma or fwhm must be set:
+
+    >>> from nipype.interfaces.fsl import Smooth
+    >>> sm = Smooth()
+    >>> sm.inputs.in_file = 'functional2.nii'
+    >>> sm.cmdline
+    Traceback (most recent call last):
+     ...
+    RuntimeError: either sigma (in mm) or fwhm need be specified.
+
     """
 
     input_spec = SmoothInputSpec