Reply to Daynes comment's and slightly loosen a tolerance in one test that has been failing

src/cdtools/datasets/ptycho_2d_dataset.py

@@ -380,7 +380,7 @@ class Ptycho2DDataset(CDataset):
         the dataset is downsampled with the data. The background is downsampled
         using the same method as the data.
 
-        If there is no quantum efficiency mask, then the mask is downsapled so
+        If there is no quantum efficiency mask, then the mask is downsampled so
         that any output pixel containing a masked pixel will be masked. If there
         is a quantum efficiency mask, then the quantum efficiency mask is
         downsampled using the same method as the data, and the mask is

src/cdtools/tools/measurements/measurements.py

@@ -196,22 +196,15 @@ def quadratic_background(
     sim_patterns : torch.Tensor
         A real MxN array storing the wavefield's intensities
     """
-
-    if detector_slice is None:
-        raw_intensity = measurement(
-            wavefield,
-            *args,
-            epsilon=epsilon,
-            oversampling=oversampling,
-            simulate_finite_pixels=simulate_finite_pixels)
-    else:
-        raw_intensity = measurement(
-            wavefield,
-            *args,
-            detector_slice=detector_slice,
-            epsilon=epsilon,
-            oversampling=oversampling,
-            simulate_finite_pixels=simulate_finite_pixels)
+    
+    raw_intensity = measurement(
+        wavefield,
+        *args,
+        detector_slice=detector_slice,
+        epsilon=epsilon,
+        oversampling=oversampling,
+        simulate_finite_pixels=simulate_finite_pixels
+    )
 
     if qe_mask is None:
         output = raw_intensity + background**2