Fix hough transform test cases

skimage/transform/__init__.py

@@ -16,7 +16,7 @@ from .pyramids import (pyramid_reduce, pyramid_expand,
 
 __all__ = ['hough_circle',
            'hough_line',
-           'probabilistic_hough_line'
+           'probabilistic_hough_line',
            'hough',
            'probabilistic_hough',
            'hough_peaks',
@@ -25,7 +25,8 @@ __all__ = ['hough_circle',
            'iradon',
            'frt2',
            'ifrt2',
-           'integral_image', 'integrate',
+           'integral_image',
+           'integrate',
            'warp',
            'warp_coords',
            'estimate_transform',

skimage/transform/hough_transform.py

@@ -1,5 +1,3 @@
-__all__ = ['hough_line_peaks']
-
 import numpy as np
 from scipy import ndimage
 from skimage import measure, morphology