diff --git a/nifty/sugar.py b/nifty/sugar.py
index 676278beb2578cb96d06ce46cd31d62a879c1402..20b68da0065e4e1a76e2c5d223de1bbd0fca8486 100644
--- a/nifty/sugar.py
+++ b/nifty/sugar.py
@@ -26,30 +26,30 @@ __all__ = ['create_power_operator']
 
 def create_power_operator(domain, power_spectrum, dtype=None,
                           distribution_strategy='not'):
-	"""Creates a diagonal operator with a certain power spectrum.
-	Constructs a diagonal operator that lives over the specified domain, or
-	its harmonic domain in case it is not harmonic.
-	Parameters
-	----------
-	domain : DomainObject
-		Domain over which the power operator shall live. If this is not a
-		harmonic domain, it will return an operator for its harmonic domain
-		instead.
-	power_spectrum : {array-like, method}
-		An array-like object, or a method that implements the square root
-		of a power spectrum as a function of k.
-	dtype : type, *optional*
-		dtype that the field holding the power spectrum shall use
-		{default : None}
-			if dtype == None: passes this on to constructor of Field
-	distribution_strategy : string, *optional*
-		Distributed strategy to be used by the underlying d2o objects.
-		{default : 'not'}
-	Returns
-	-------
-	DiagonalOperator : An operator that lives that implements the given power
-		spectrum.
-	"""
+    """ Creates a diagonal operator with a certain power spectrum.
+    Constructs a diagonal operator that lives over the specified domain, or
+    its harmonic domain in case it is not harmonic.
+    Parameters
+    ----------
+    domain : DomainObject
+        Domain over which the power operator shall live. If this is not a
+        harmonic domain, it will return an operator for its harmonic domain
+        instead.
+    power_spectrum : {array-like, method}
+        An array-like object, or a method that implements the square root
+        of a power spectrum as a function of k.
+    dtype : type, *optional*
+        dtype that the field holding the power spectrum shall use
+        {default : None}
+        if dtype == None: passes this on to constructor of Field
+    distribution_strategy : string, *optional*
+        Distributed strategy to be used by the underlying d2o objects.
+        {default : 'not'}
+    Returns
+    -------
+    DiagonalOperator : An operator that lives that implements the given power
+    spectrum.
+    """
     if not domain.harmonic:
         fft = FFTOperator(domain)
         domain = fft.target[0]