Removed extra '=' when converting single add opns jvm option (fixes #50610)

Author: mswiderski

independent-projects/bootstrap/app-model/src/main/java/io/quarkus/bootstrap/model/MutableStandardJvmOption.java

@@ -64,7 +64,7 @@ private List<String> toCliModulePackageList() {
         var name = getName();
         var values = getValues();
         if (values.size() == 1) {
-            return List.of(DASH_DASH + name + EQUALS + EQUALS + values.iterator().next());
+            return List.of(DASH_DASH + name + EQUALS + values.iterator().next());
         }
         final Map<String, Set<String>> modulePackages = new HashMap<>(values.size());
         for (String value : values) {

independent-projects/bootstrap/app-model/src/test/java/io/quarkus/bootstrap/model/MutableStandardJvmOptionTest.java

@@ -47,4 +47,12 @@ public void testCliArgumentAddOpens() {
                         "--add-opens", "java.base/java.util=ALL-UNNAMED");
     }
 
+    @Test
+    public void testCliArgumentSingleAddOpens() {
+        assertThat(MutableStandardJvmOption.newInstance("add-opens")
+                .addValue("java.base/java.util=ALL-UNNAMED")
+                .toCliOptions())
+                .containsExactly("--add-opens=java.base/java.util=ALL-UNNAMED");
+    }
+
 }