diff --git a/sumpy/visualization.py b/sumpy/visualization.py
index 3a4dc8df66512fdf1da8e5e3c40fa1794e0bcfad..bf5f016b4c089be7723a2ff92c91530c998603c2 100644
--- a/sumpy/visualization.py
+++ b/sumpy/visualization.py
@@ -64,35 +64,35 @@ def separate_by_real_and_imag(data, real_only):
 
 
 def make_field_plotter_from_bbox(bbox, h, extend_factor=0):
-        """
-        :arg bbox: a tuple (low, high) of points represented as 1D numpy arrays
-            indicating the low and high ends of the extent of a bounding box.
-        :arg h: Either a number or a sequence of numbers indicating the desired
-            (approximate) grid spacing in all or each of the dimensions. If a
-            sequence, the length must match the number of dimensions.
-        :arg extend_factor: A floating point number indicating by what percentage
-            the plot area should be grown compared to *bbox*.
-        """
-        low, high = bbox
-
-        extent = (high-low) * (1 + extend_factor)
-        center = 0.5*(high+low)
-
-        dimensions = len(center)
-        from numbers import Number
-        if isinstance(h, Number):
-            h = (h,)*dimensions
-        else:
-            if len(h) != dimensions:
-                raise ValueError("length of 'h' must match number of dimensions")
+    """
+    :arg bbox: a tuple (low, high) of points represented as 1D numpy arrays
+        indicating the low and high ends of the extent of a bounding box.
+    :arg h: Either a number or a sequence of numbers indicating the desired
+        (approximate) grid spacing in all or each of the dimensions. If a
+        sequence, the length must match the number of dimensions.
+    :arg extend_factor: A floating point number indicating by what percentage
+        the plot area should be grown compared to *bbox*.
+    """
+    low, high = bbox
+
+    extent = (high-low) * (1 + extend_factor)
+    center = 0.5*(high+low)
+
+    dimensions = len(center)
+    from numbers import Number
+    if isinstance(h, Number):
+        h = (h,)*dimensions
+    else:
+        if len(h) != dimensions:
+            raise ValueError("length of 'h' must match number of dimensions")
 
-        from math import ceil
+    from math import ceil
 
-        npoints = tuple(
-                int(ceil(extent[i] / h[i]))
-                for i in range(dimensions))
+    npoints = tuple(
+            int(ceil(extent[i] / h[i]))
+            for i in range(dimensions))
 
-        return FieldPlotter(center, extent, npoints)
+    return FieldPlotter(center, extent, npoints)
 
 
 class FieldPlotter(object):