CLDR-19142 Improve ST warnings for invalid path votes

tools/cldr-apps/src/main/java/org/unicode/cldr/web/STFactory.java

@@ -488,6 +488,7 @@ private void loadVoteValues() {
                     }
                     if (!isValidSurveyToolVote(
                             theSubmitter, xpath)) { // Make sure it is a visible path
+                        SurveyLog.warnOnce(logger, "Ignoring invalid vote for path " + xpath);
                         continue;
                     }
                     try {
@@ -1821,7 +1822,7 @@ public final PathHeader getPathHeader(String xpath) {
         try {
             return getPathHeaderFactory().fromPath(xpath);
         } catch (Throwable t) {
-            SurveyLog.warnOnce(logger, "PH for path " + xpath + t);
+            SurveyLog.warnOnce(logger, "PH for path " + xpath + t + "\nCaused by: " + t.getCause());
             return null;
         }
     }

tools/cldr-code/src/main/java/org/unicode/cldr/util/Emoji.java

@@ -396,7 +396,9 @@ public static String getMinorCategory(String emoji) {
                 throw new InternalCldrException(
                         "No minor category (aka subgroup) found for "
                                 + emoji
-                                + ". Update emoji-test.txt to latest, and adjust PathHeader.. functionMap.put(\"minor\", ...");
+                                + " (U+"
+                                + Utility.hex(emoji)
+                                + "). Update emoji-test.txt to latest, and adjust PathHeader.. functionMap.put(\"minor\", ...");
             }
         }
         return minorCat;
@@ -438,9 +440,11 @@ public static String getMajorCategory(String emoji) {
                 majorCat = "Symbols";
             } else {
                 throw new InternalCldrException(
-                        "No minor category (aka subgroup) found for "
+                        "No major category (aka group) found for "
                                 + emoji
-                                + ". Update emoji-test.txt to latest, and adjust PathHeader.. functionMap.put(\"major\", ...");
+                                + " (U+"
+                                + Utility.hex(emoji)
+                                + "). Update emoji-test.txt to latest, and adjust PathHeader.. functionMap.put(\"major\", ...");
             }
         }
         return majorCat;

tools/cldr-code/src/main/java/org/unicode/cldr/util/PathHeader.java

@@ -775,7 +775,7 @@ public PathHeader fromPath(final String path, List<String> failures) {
                     return result;
                 } catch (Exception e) {
                     throw new IllegalArgumentException(
-                            "Probably mismatch in Page/Section enum, or too few capturing groups in regex for "
+                            "Possible mismatch in Page/Section enum, or too few capturing groups in regex for "
                                     + path,
                             e);
                 }