Merge #14820: test: Fix descriptor_tests not checking ToString output of public descriptors

c77f092 Fix descriptor_tests not checking ToString output of public descriptors (Russell Yanofsky)

Pull request description:

  This fixes a minor test bug introduced in #13697 that I noticed while reviewing #14646

Tree-SHA512: efed91200cdff5f86ba5de3461ac00759d285e2905f6cb24cea15d3e23e0581ce5fc14b24a40db093f7ebd662ee1ee2cf67f8798bac1903a78298eda08909cfb

Author: MarcoFalke

src/test/descriptor_tests.cpp

@@ -62,7 +62,7 @@ void Check(const std::string& prv, const std::string& pub, int flags, const std:
 
     // Check that both versions serialize back to the public version.
     std::string pub1 = parse_priv->ToString();
-    std::string pub2 = parse_priv->ToString();
+    std::string pub2 = parse_pub->ToString();
     BOOST_CHECK_EQUAL(pub, pub1);
     BOOST_CHECK_EQUAL(pub, pub2);