tests: use cmp.Diff instead of godebug

go.mod

@@ -3,7 +3,6 @@ module willnorris.com/go/microformats
 require (
 	github.com/PuerkitoBio/goquery v1.8.0
 	github.com/google/go-cmp v0.5.9
-	github.com/kylelemons/godebug v1.1.0
 	golang.org/x/net v0.2.0
 )
 

go.sum

@@ -4,8 +4,6 @@ github.com/andybalholm/cascadia v1.3.1 h1:nhxRkql1kdYCc8Snf7D5/D3spOX+dBgjA6u8x0
 github.com/andybalholm/cascadia v1.3.1/go.mod h1:R4bJ1UQfqADjvDa4P6HZHLh/3OxWWEqc0Sk8XGwHqvA=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
-github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 golang.org/x/net v0.0.0-20210916014120-12bc252f5db8/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
 golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=

testsuite_test.go

@@ -15,7 +15,6 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
-	"github.com/kylelemons/godebug/pretty"
 	"willnorris.com/go/microformats"
 )
 
@@ -106,7 +105,7 @@ func runTest(t *testing.T, test string) {
 		t.Fatalf("error unmarshaling json: %v", err)
 	}
 
-	if !cmp.Equal(got, want) {
-		t.Fatalf("Parse value differs:\n%v", pretty.Compare(want, got))
+	if diff := cmp.Diff(got, want); diff != "" {
+		t.Fatalf("Parse value differs:\n%v", diff)
 	}
 }