R Clean up MarkdownTable class wrapping

Author: ScottBob

approvaltests-tests/src/test/java/org/approvaltests/TableTest.java

@@ -19,9 +19,9 @@ void differentCases()
   {
     // begin-snippet: markdown_table_example
     String[] inputs = {"verify json", "verify all", "verify parameters", "verify as json"};
-    MarkdownTableBasic table = MarkdownTableBasic.withHeaders("Input", "Camel Case", "Snake Case", "Kebab Case");
+    MarkdownTable table = MarkdownTable.withHeaders("Input", "Camel Case", "Snake Case", "Kebab Case");
     table.addRowsForInputs(inputs, this::toCamelCase, this::toSnakeCase, this::toKebabCase);
-    Approvals.verify(new MarkdownTable(table));
+    Approvals.verify(table);
     // end-snippet
   }
   private String toKebabCase(String input)

approvaltests/src/main/java/org/approvaltests/utils/MarkdownTable.java

@@ -18,6 +18,9 @@ public static <I, O> MarkdownTable create(I[] inputs, Function1<I, O> o, String
   {
     return new MarkdownTable(MarkdownTableBasic.create(inputs, o, column1, column2));
   }
+  public static MarkdownTable withHeaders(String... columnNames) {
+    return new MarkdownTable(MarkdownTableBasic.withHeaders(columnNames));
+  }
   @Override
   public VerifyParameters getVerifyParameters(Options options)
   {