Fix tests

pmd-core/src/main/java/net/sourceforge/pmd/RuleSetLoader.java

@@ -217,7 +217,7 @@ public final class RuleSetLoader {
             }
         }
         if (!anyRules) {
-            reporter.warn("No rules found. Maybe you misspelled a rule name? ({0})",
+            reporter.warn("No rules found. Maybe you misspelled a rule name? ({})",
                           StringUtils.join(rulesetPaths, ','));
         }
         return ruleSets;
@@ -231,7 +231,7 @@ public final class RuleSetLoader {
             }
         }
         if (ruleset.getRules().isEmpty()) {
-            reporter.warn("No rules found in ruleset {0}", path);
+            reporter.warn("No rules found in ruleset {}", path);
         }
 
     }