Add broken test

src/commonTest/kotlin/testMerge.kt

@@ -132,4 +132,16 @@ class BasicTest {
         result.blocks.filter { it is MergedBlock.Unchanged }
         assertTrue(true)
     }
+
+    @Test
+    fun testMergeUnchanged() {
+        Log.connectConsole()
+        val source = "abc".toList()
+        val their = "abDEF".toList()
+        val our = "abcGHY".toList()
+
+        val result = merge3(source, their, our)
+        println(result.merged.str)
+        assertTrue(false)
+    }
 }