Address PR comments

src/kbmod/masking.py

@@ -77,7 +77,7 @@ def apply_mask_operations(config, stack):
         for i in range(stack.img_count()):
             stack.get_single_image(i).grow_mask(config["mask_grow"])
 
-    # Apply the masks to the images.
+    # Apply the masks to the images. Use 0xFFFFFF to apply all active masking bits.
     for i in range(stack.img_count()):
         stack.get_single_image(i).apply_mask(0xFFFFFF)
 

src/kbmod/search/layered_image.h

@@ -93,7 +93,7 @@ class LayeredImage {
     PSF psf;
     RawImage science;
     RawImage mask;
-    RawImage variance;   
+    RawImage variance;
 };
 
 } /* namespace search */

src/kbmod/search/pydocs/image_stack_docs.h

@@ -33,7 +33,7 @@ static const auto DOC_ImageStack_build_zeroed_times = R"doc(
   ")doc";
 
 static const auto DOC_ImageStack_make_global_mask = R"doc(
-  Create a new global mask that from a set of flags and a threshold.
+  Create a new global mask from a set of flags and a threshold.
   The global mask marks a pixel as masked if and only if it is masked
   by one of the given flags in at least ``threshold`` individual images.
   The returned mask is binary.

tests/test_layered_image.py

@@ -151,7 +151,7 @@ def test_binarize_mask(self):
         for x in range(9):
             mask.set_pixel(10, x, x)
 
-        # Only keep the mask at for pixels with flags at
+        # Only keep the mask for pixels with flags at
         # bit positions 0 and 2 (1 + 4 = 5).
         self.image.binarize_mask(5)
         self.assertEqual(mask.get_pixel(10, 0), 0)
@@ -204,7 +204,7 @@ def test_add_threshold_mask_flags(self):
                     masked_pixels[index] = True
         self.assertGreater(len(masked_pixels), 0)
 
-        # Reset the mask an perform threshold masking.
+        # Reset the mask and perform threshold masking.
         mask = self.image.get_mask()
         mask.set_all(0.0)
         self.image.union_threshold_masking(threshold)