Avoid "man-in-the-middle" term.

See https://source.android.com/setup/contribute/respectful-code#term-examples

Change-Id: Iad70e328fcfe84171dae9a83a0981686e7503e9b
Bug: 140836267
diff --git a/src/main/javatest/com/google/security/cryptauth/lib/securegcm/Ukey2HandshakeTest.java b/src/main/javatest/com/google/security/cryptauth/lib/securegcm/Ukey2HandshakeTest.java
index f5d0e1a..49e6f30 100644
--- a/src/main/javatest/com/google/security/cryptauth/lib/securegcm/Ukey2HandshakeTest.java
+++ b/src/main/javatest/com/google/security/cryptauth/lib/securegcm/Ukey2HandshakeTest.java
@@ -163,7 +163,7 @@
 
   /**
    * Tests that verification codes are different for different handshake runs. Also tests a full
-   * man-in-the-middle attack.
+   * on-path attack.
    */
   public void testVerificationCodeUniqueToSession() throws Exception {
     if (KeyEncoding.isLegacyCryptoRequired()) {