CLDR-11155 Pages too big: revise test for large pages

-In testPageSize in TestPathHeader.java, show not only Section but also Page

-Also show log/error thresholds, and use String.format, per suggestions in PR 3519

tools/cldr-code/src/test/java/org/unicode/cldr/unittest/TestPathHeader.java

@@ -1684,14 +1684,14 @@ public void testPageSize() {
         final long minError = 946; // above this, emit error
         final long minLog = 700; // otherwise above this, emit warning
         Factory factory = CLDRConfig.getInstance().getCommonAndSeedAndMainAndAnnotationsFactory();
-        // "en", "cs", "ar", "pl"
         List<String> locales =
                 StandardCodes.make()
                         .getLocaleCoverageLocales(Organization.cldr, ImmutableSet.of(Level.MODERN))
                         .stream()
                         .filter(x -> CLDRLocale.getInstance(x).getCountry().isEmpty())
                         .collect(Collectors.toUnmodifiableList());
         List<Counter<PageId>> counters = new ArrayList<>();
+        final String thresholdExplanation = "log/error thresholds are " + minLog + "/" + minError;
         for (String locale : locales) {
             CLDRFile cldrFile = factory.make(locale, false);
             PathHeader.Factory phf = PathHeader.getFactory();
@@ -1703,23 +1703,20 @@ public void testPageSize() {
             }
             for (PageId entry : c.getKeysetSortedByKey()) {
                 long count = c.getCount(entry);
-                if (count > minError) {
-                    errln(
-                            locale
-                                    + "\t"
-                                    + entry.getSectionId()
-                                    + "\t"
-                                    + entry
-                                    + "\thas too many entries:\t"
-                                    + count);
-                } else if (count > minLog) {
-                    warnln(
-                            locale
-                                    + "\t"
-                                    + entry.getSectionId()
-                                    + "\t"
-                                    + "\thas too many entries:\t"
-                                    + count);
+                if (count > minLog) {
+                    final String message =
+                            String.format(
+                                    "%s\t%s\t%s\thas too many entries:\t%d\t(%s)",
+                                    locale,
+                                    entry.getSectionId().toString(),
+                                    entry,
+                                    count,
+                                    thresholdExplanation);
+                    if (count > minError) {
+                        errln(message);
+                    } else {
+                        warnln(message);
+                    }
                 }
             }
         }