add test case for UseSTD3ASCIIRules with compat equals

unicodetools/data/idna/dev/IdnaTestV2.txt

@@ -1,5 +1,5 @@
 # IdnaTestV2.txt
-# Date: 2024-05-23, 04:13:59 GMT
+# Date: 2024-07-03, 20:55:13 GMT
 # © 2024 Unicode®, Inc.
 # Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the U.S. and other countries.
 # For terms of use and license, see https://www.unicode.org/terms_of_use.html
@@ -566,6 +566,11 @@ AO\u0308; aö; ; xn--a-1ga; ; ;  # aö
 AÖ; aö; ; xn--a-1ga; ; ;  # aö
 Aö; aö; ; xn--a-1ga; ; ;  # aö
 Ao\u0308; aö; ; xn--a-1ga; ; ;  # aö
+＝\u0338; ; [U1]; xn--5ta3800k; ; ;  # ＝̸
+≠; ; ; xn--1ch; ; ;  # ≠
+=\u0338; ≠; ; xn--1ch; ; ;  # ≠
+xn--1ch; ≠; ; xn--1ch; ; ;  # ≠
+xn--5ta3800k; ＝\u0338; [U1]; xn--5ta3800k; ; ;  # ＝̸
 
 # RANDOMIZED TESTS
 

unicodetools/src/main/java/org/unicode/idna/GenerateIdnaTest.java

@@ -974,5 +974,10 @@ public static UnicodeSet getIdna2008Valid() {
         // IdnaTestV2.txt missed a bug in the UTS 46 implementation that I'm writing due to
         // not testing an upper-case letter in the ASCII part of Punycode when there are no errors.
         "xn--A-1ga",
+        // https://www.unicode.org/L2/L2024/24063-pubrev.html#ID20240402104744 / PAG issue #282:
+        // Subtle behavior change for UseSTD3ASCIIRules=true
+        // due to simplified checking only in Validity Criteria, after Map+Normalize.
+        // fullwidth equals + combining solidus overlay
+        "\uFF1D\u0338",
     };
 }