Better (?) default left margin

tests/test_cutleft_narrow_pages.py

@@ -17,7 +17,7 @@ class NarrowPageCropTests(unittest.TestCase):
         narrow.paste('blue', (0, 0, 300, 600))
         thin = Image.new('RGB', (200, 600), 'yellow')
         with patch.object(cutleft, 'get_pdf_pages', return_value=[normal, narrow, thin]):
-            result = cutleft.process_single_pdf(Path('/tmp/no-original/Copy.pdf'))
+            result = cutleft.process_single_pdf(Path('/tmp/no-original/Copy.pdf'), automatic_margin=False)
         _, images, schema = result
         image = images[0]
         self.assertEqual(schema['full_width_pages'], [3])
@@ -39,7 +39,7 @@ class NarrowPageCropTests(unittest.TestCase):
         narrow.paste('blue', (50, 0, 450, 600))
         with patch.object(cutleft, 'get_pdf_pages', return_value=[normal, narrow]):
             result = cutleft.process_single_pdf(
-                Path('/tmp/no-original/Copy.pdf'), shift_offset=50, width_offset=100)
+                Path('/tmp/no-original/Copy.pdf'), shift_offset=50, width_offset=100, automatic_margin=False)
         self.assertEqual(result[1][0].size, (805, 600))
         self.assertEqual(result[1][0].getpixel((405, 0)), (0, 0, 255))
         self.assertEqual(result[1][0].getpixel((804, 0)), (0, 0, 255))
@@ -54,14 +54,14 @@ class NarrowPageCropTests(unittest.TestCase):
                 document.save(originals / 'Copy.pdf')
             images = [Image.new('RGB', (900, 2339)), Image.new('RGB', (750, 2339))]
             with patch.object(cutleft, 'get_pdf_pages', return_value=images):
-                result = cutleft.process_single_pdf(root / 'Copies' / 'Copy.pdf')
+                result = cutleft.process_single_pdf(root / 'Copies' / 'Copy.pdf', automatic_margin=False)
             self.assertEqual(result[2]['full_width_pages'], [])
             self.assertEqual(result[1][0].width, 2 * int((1191 / 2 * 200 / 72) // 3) + 5)
 
     def test_small_main_split_adjustments_keep_margin_cropping(self):
         images = [Image.new('RGB', (1600, 2339)), Image.new('RGB', (1694, 2339))]
         with patch.object(cutleft, 'get_pdf_pages', return_value=images):
-            result = cutleft.process_single_pdf(Path('/tmp/no-original/Copy.pdf'))
+            result = cutleft.process_single_pdf(Path('/tmp/no-original/Copy.pdf'), automatic_margin=False)
         self.assertEqual(result[2]['full_width_pages'], [])
         self.assertEqual(result[1][0].width, 2 * (1694 // 3) + 5)