Use JUnit 5 conventions

Author: garydgregory

src/test/java/org/apache/commons/cli/help/HelpFormatterTest.java

@@ -161,7 +161,7 @@ void testPrintHelpHeader() throws IOException {
     }
 
     @Test
-    public void testPrintHelpWithIterableOptions() throws IOException {
+    void testPrintHelpWithIterableOptions() throws IOException {
         final StringBuilder sb = new StringBuilder();
         final TextHelpAppendable serializer = new TextHelpAppendable(sb);
         HelpFormatter formatter = HelpFormatter.builder().setHelpAppendable(serializer).get();

src/test/java/org/apache/commons/cli/help/TextHelpAppendableTest.java

@@ -37,13 +37,13 @@ Licensed to the Apache Software Foundation (ASF) under one or more
 /**
  * Tests {@link TextHelpAppendable}.
  */
-public final class TextHelpAppendableTest {
+final class TextHelpAppendableTest {
 
     private StringBuilder sb;
     private TextHelpAppendable underTest;
 
     @BeforeEach
-    public void setUp() {
+    void setUp() {
         sb = new StringBuilder();
         underTest = new TextHelpAppendable(sb);
     }

…che/commons/cli/help/TextStyleTests.java …ache/commons/cli/help/TextStyleTest.javasrc/test/java/org/apache/commons/cli/help/TextStyleTests.java renamed to src/test/java/org/apache/commons/cli/help/TextStyleTest.java src/test/java/org/apache/commons/cli/help/TextStyleTests.java renamed to src/test/java/org/apache/commons/cli/help/TextStyleTest.java

@@ -28,9 +28,9 @@ Licensed to the Apache Software Foundation (ASF) under one or more
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class TextStyleTests {
+class TextStyleTest {
 
-    public static Stream<Arguments> padTestData() {
+    static Stream<Arguments> padTestData() {
         final List<Arguments> lst = new ArrayList<>();
         final TextStyle.Builder builder = TextStyle.builder();
         builder.setIndent(5);