"Empty comparators" was Expected etc change

src/main/java/walkingkooka/spreadsheet/compare/SpreadsheetColumnOrRowSpreadsheetComparatorNames.java

@@ -508,7 +508,7 @@ private static List<SpreadsheetComparatorNameAndDirection> checkComparatorNameAn
                 Objects.requireNonNull(comparatorNameAndDirections, "comparatorNameAndDirections")
         );
         if (comparatorNameAndDirections.isEmpty()) {
-            throw new IllegalArgumentException("Expected at least 1 comparator got none");
+            throw new IllegalArgumentException("Empty comparators");
         }
         return copy;
     }

src/main/java/walkingkooka/spreadsheet/compare/SpreadsheetColumnOrRowSpreadsheetComparators.java

@@ -86,7 +86,7 @@ public static SpreadsheetColumnOrRowSpreadsheetComparators with(final Spreadshee
     private SpreadsheetColumnOrRowSpreadsheetComparators(final SpreadsheetColumnOrRowReference columnOrRow,
                                                          final List<SpreadsheetComparator<?>> comparators) {
         if (comparators.isEmpty()) {
-            throw new IllegalArgumentException("Expected at least 1 comparator got none");
+            throw new IllegalArgumentException("Empty comparators");
         }
 
         this.columnOrRow = columnOrRow;