BF: Fix escape sequences that are deprecated in Python 3.6

Klaus Sembritzki · Klaus Sembritzki · commit 0961b4c3239b · 2018-02-03T14:17:54.000+01:00
https://docs.python.org/3/whatsnew/3.6.html#deprecated-python-behavior
diff --git a/nipy/algorithms/statistics/rft.py b/nipy/algorithms/statistics/rft.py
@@ -56,7 +56,7 @@ def binomial(n, k):
 
 
 def Q(dim, dfd=np.inf):
-    """ Q polynomial
+    r""" Q polynomial
 
     If `dfd` == inf (the default), then Q(dim) is the (dim-1)-st Hermite
     polynomial:
@@ -518,7 +518,7 @@ def _quasi_polynomials(self, dim):
         return quasi_polynomials
 
     def quasi(self, dim):
-        """ (Quasi-)polynomial parts of EC density in dimension `dim`
+        r""" (Quasi-)polynomial parts of EC density in dimension `dim`
 
         - ignoring a factor of (2\pi)^{-(dim+1)/2} in front.
         """
diff --git a/nipy/algorithms/statistics/tests/test_rft.py b/nipy/algorithms/statistics/tests/test_rft.py
@@ -48,7 +48,7 @@ def test_Q():
 
 
 def K(dim=4, dfn=7, dfd=np.inf):
-    """
+    r"""
     Determine the polynomial K in:
 
         Worsley, K.J. (1994). 'Local maxima and the expected Euler
@@ -109,7 +109,7 @@ def F(x, dim, dfd=np.inf, dfn=1):
 
 
 def polyF(dim, dfd=np.inf, dfn=1):
-    """
+    r"""
     Return the polynomial part of the EC density when evaluating the polynomial
     on the sqrt(F) scale (or sqrt(chi^2)=chi scale).
 
diff --git a/nipy/core/image/image.py b/nipy/core/image/image.py
@@ -287,7 +287,7 @@ def reordered_axes(self, order=None):
                                          coordmap=new_cmap)
 
     def renamed_axes(self, **names_dict):
-        """ Return a new image with input (domain) axes renamed
+        r""" Return a new image with input (domain) axes renamed
 
         Axes renamed according to the input dictionary.
 
@@ -313,7 +313,7 @@ def renamed_axes(self, **names_dict):
         return self.__class__.from_image(self, coordmap=new_cmap)
 
     def renamed_reference(self, **names_dict):
-        """ Return new image with renamed output (range) coordinates
+        r""" Return new image with renamed output (range) coordinates
 
         Coordinates renamed according to the dictionary
 
diff --git a/nipy/core/reference/coordinate_system.py b/nipy/core/reference/coordinate_system.py
@@ -370,7 +370,7 @@ def safe_dtype(*dtypes):
 
 
 def product(*coord_systems, **kwargs):
-    """Create the product of a sequence of CoordinateSystems.
+    r"""Create the product of a sequence of CoordinateSystems.
 
     The coord_dtype of the result will be determined by ``safe_dtype``.
 
