Add \n delimiter between url and max_width

This prevents `get_embed_hash('https://example.com/embed', 400)` and `get_embed_hash('https://example.com/embed400')` from returning the same result.

wagtail/embeds/embeds.py

@@ -63,5 +63,6 @@ def get_embed_hash(url, max_width=None):
     h = md5()
     h.update(url.encode("utf-8"))
     if max_width is not None:
+        h.update(b"\n")
         h.update(str(max_width).encode("utf-8"))
     return h.hexdigest()

wagtail/embeds/tests/test_embeds.py

@@ -212,8 +212,8 @@ class TestEmbedHash(TestCase):
     def test_get_embed_hash(self):
         url = "www.test.com/1234"
         self.assertEqual(get_embed_hash(url), "9a4cfc187266026cd68160b5db572629")
-        self.assertEqual(get_embed_hash(url, 0), "be54b69772d5e086ec07748741455736")
-        self.assertEqual(get_embed_hash(url, 1), "601c15cca60eb068ebcc166b9587ed63")
+        self.assertEqual(get_embed_hash(url, 0), "946fb9597a6c74ab3cef1699eff7fde7")
+        self.assertEqual(get_embed_hash(url, 1), "427830227a86093b50417e11dbd2f28e")
 
 
 class TestChooser(TestCase, WagtailTestUtils):