Simplify code

Author: kcooney

src/main/java/junit/runner/BaseTestRunner.java

@@ -269,6 +269,10 @@ public static String getFilteredTrace(Throwable e) {
         e.printStackTrace(writer);
         String trace = stringWriter.toString();
         if (!showStackRaw()) {
+            /*
+             * Since we have an exception and a stack trace, we can use the new
+             * stack trace filtering code.
+             */
             return StackTraceFilterer.getFilteredTrace(e, trace);
         }
         return BaseTestRunner.getFilteredTrace(trace);