Add an adhoc check in the HtmlTagIntegrityChecker

This is very adhoc and will require a better implementation if there are more of those type of issue.
Also expecting for most of them to go away.

webapp/src/main/java/com/box/l10n/mojito/service/assetintegritychecker/integritychecker/HtmlTagIntegrityChecker.java

@@ -33,11 +33,11 @@ public String getRegex() {
   public void check(String sourceContent, String targetContent) throws IntegrityCheckException {
     logger.debug("Get Html tags of the target");
     List<String> targetHtmlTags = getHtmlTags(targetContent);
-    logger.debug("Target Html tags: {}", targetHtmlTags);
+    logger.info("Target Html tags: {}", targetHtmlTags);
 
     logger.debug("Get Html tags of the source");
     List<String> sourceHtmlTags = getHtmlTags(sourceContent);
-    logger.debug("Source Html tags: {}", sourceHtmlTags);
+    logger.info("Source Html tags: {}", sourceHtmlTags);
 
     Map<String, Long> sourceTagCount =
         sourceHtmlTags.stream()
@@ -73,6 +73,19 @@ public void check(String sourceContent, String targetContent) throws IntegrityCh
     if (!isValidTagOrder(targetHtmlTags)) {
       throw new HtmlTagIntegrityCheckerException("HTML tags in target are not in valid order");
     }
+
+    logger.debug("Ad-hoc checks");
+    checkDoubleAnnotationElements(sourceContent, targetContent);
+  }
+
+  /** Adhoc check to unblock. Eventually needs a better solution. */
+  void checkDoubleAnnotationElements(String sourceContent, String targetContent) {
+    String doubleAnnotationString = "<annotation <annotation";
+    if (!sourceContent.contains(doubleAnnotationString)
+        && targetContent.contains(doubleAnnotationString)) {
+      throw new HtmlTagIntegrityCheckerException(
+          "Target must not contain: '%s'".formatted(doubleAnnotationString));
+    }
   }
 
   /**

webapp/src/test/java/com/box/l10n/mojito/service/assetintegritychecker/integritychecker/HtmlTagIntegrityCheckerTest.java

@@ -193,6 +193,14 @@ public void testHtmlTagCheckCloseTagsSame() {
     checker.check(source, target);
   }
 
+  @Test(expected = HtmlTagIntegrityCheckerException.class)
+  public void testHtmlTagCheckWithDuplicatedOpening() {
+    String source = "<annotation url=\"https://something.com\">text</annotation>";
+    String target = "<annotation &lt;annotation url=\"https://something.com\">text</annotation>";
+
+    checker.check(source, target);
+  }
+
   @Test
   public void testHtmlTagCheckNonTagLessThanDoesntConfuseThings() {
     String source = "Upload is <10% complete.";