Ignore webmention title if it's a prefix of the content

Fix #4

webmentionVerification.go

@@ -211,6 +211,10 @@ func (a *goBlog) verifyReader(m *mention, body io.Reader) error {
 			m.Title = title.Text()
 		}
 	}
+	// Reset title if it's just a prefix of the content
+	if m.Title != "" && strings.HasPrefix(m.Content, m.Title) {
+		m.Title = ""
+	}
 	return nil
 }
 

webmentionVerification_test.go

@@ -99,7 +99,7 @@ func Test_verifyMentionBidgy(t *testing.T) {
 	require.Equal(t, "https://example.org/walks/2021/11/9k-local-run", m.Target)
 	require.Equal(t, "https://example.com/abc", m.Source)
 	require.Equal(t, "https://example.net/notice/ADYb7HhxE6UzPpfFiK", m.Url)
-	require.Equal(t, "comment test", m.Title)
+	require.Equal(t, "", m.Title)
 	require.Equal(t, "comment test", m.Content)
 	require.Equal(t, "m4rk", m.Author)
 }