refactor(cipher_test): `plantext` -> `plaintext` (#3669)

Signed-off-by: Ryan Russell <git@ryanrussell.org>

Signed-off-by: Ryan Russell <git@ryanrussell.org>

weed/util/cipher_test.go

@@ -9,9 +9,9 @@ func TestSameAsJavaImplementation(t *testing.T) {
 	str := "QVVhmqg112NMT7F+G/7QPynqSln3xPIhKdFGmTVKZD6IS0noyr2Z5kXFF6fPjZ/7Hq8kRhlmLeeqZUccxyaZHezOdgkjS6d4NTdHf5IjXzk7"
 	cipherText, _ := base64.StdEncoding.DecodeString(str)
 	secretKey := []byte("256-bit key for AES 256 GCM encr")
-	plantext, err := Decrypt(cipherText, CipherKey(secretKey))
+	plaintext, err := Decrypt(cipherText, CipherKey(secretKey))
 	if err != nil {
 		println(err.Error())
 	}
-	println(string(plantext))
+	println(string(plaintext))
 }