Fix sonar issue: Remove public keyword from test
diff --git a/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/TDistributionTest.java b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/TDistributionTest.java
index a48ff7d..0ef996a 100644
--- a/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/TDistributionTest.java
+++ b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/TDistributionTest.java
@@ -166,7 +166,7 @@
 
     // See https://issues.apache.org/jira/browse/STATISTICS-25
     @Test
-    public void testStatistics25() {
+    void testStatistics25() {
         final double[] df = {1, 10, 1e2, 1e3, 1e4, 1e5,
                              1e6, 2e6, 2.98e6, 2.99e6, 3e6, 4e6,
                              1e7, 1e8, 1e9, 1e10};