Initial support for user general remarks

tests/test_annotation_modifications.py

@@ -76,6 +76,21 @@ class ModificationTests(unittest.TestCase):
         self.assertTrue(all(abs(a-b) < 12 for a, b in zip(image.getpixel(xy), expected)),
                         (image.getpixel(xy), expected))
 
+    def test_general_remarks_survive_repeated_body_edits(self):
+        from copienator.general_remarks import IMAGE_FILENAME
+        for mode in ("Bnot", "BGnot"):
+            with self.subTest(mode=mode):
+                self.mode = mode
+                self.seed()
+                image = Image.new("RGB", (120, 60), "magenta")
+                image.save(self.output / IMAGE_FILENAME)
+                original = (self.output / IMAGE_FILENAME).read_bytes()
+                for _ in range(2):
+                    self.apply("Copie43 Ex 1 c{40}2> |Ex 2")
+                    self.assertEqual((self.output / IMAGE_FILENAME).read_bytes(), original)
+                    self.assert_color(self.image("Concat"), (50, 30), "magenta")
+                    self.assertTrue((self.output / "Concat_F.pdf").is_file())
+
     def test_cut_uses_body_height_preserves_own_headers_and_scores(self):
         self.apply("Copie43 Ex 1 c{40}2> |Ex 2")
         source, target = self.image("Ex 1"), self.image("Ex 2")