fixup! fix: improved error message on broken CIDv0

Author: rvagg

path.go

@@ -184,7 +184,7 @@ func SplitAbsPath(fpath Path) (cid.Cid, []string, error) {
 func decodeCid(cstr string) (cid.Cid, error) {
 	c, err := cid.Decode(cstr)
 	if err != nil && len(cstr) == 46 && cstr[:2] == "qm" { // https://github.com/ipfs/go-ipfs/issues/7792
-		return cid.Cid{}, fmt.Errorf("%v: This looks like a CIDv0 that has been lowercased. Convert the CIDv0 to CIDv1 in case-insensitive base32 using 'ipfs cid base32 <Qm..>' and try again.", err)
+		return cid.Cid{}, fmt.Errorf("%v: This looks like a CIDv0 that has been lowercased; consider converting to a case-agnostic CIDv1, such as base32", err)
 	}
 	return c, err
 }

path_test.go

@@ -109,7 +109,7 @@ func TestV0ErrorDueToLowercase(t *testing.T) {
 	if err == nil {
 		t.Fatal("should have failed to decode")
 	}
-	if !strings.HasSuffix(err.Error(), "This looks like a CIDv0 that has been lowercased. Convert the CIDv0 to CIDv1 in case-insensitive base32 using 'ipfs cid base32 <Qm..>' and try again.") {
+	if !strings.HasSuffix(err.Error(), "This looks like a CIDv0 that has been lowercased; consider converting to a case-agnostic CIDv1, such as base32") {
 		t.Fatal("should have meaningful info about case-insensitive fix")
 	}
 }