Fix: assumption became assertion by mistake

src/tests/junit/org/apache/tools/ant/filters/TokenFilterTest.java

@@ -188,7 +188,7 @@ public class TokenFilterTest {
     @Test
     public void testContainsRegex() throws IOException {
         buildRule.executeTarget("hasregex");
-        assertThat("Regex not present",
+        assumeThat("Regex not present",
                 getFileString(buildRule.getProject().getProperty("output") + "/replaceregexp"),
                 containsString("bye world"));