Added links to wiki for FormatCreditCard

lib/src/main/java/rife/render/FormatCreditCard.java

@@ -31,6 +31,7 @@ import rife.template.ValueRenderer;
  * </pre>
  *
  * @author <a href="https://erik.thauvin.net/">Erik C. Thauvin</a>
+ * @see <a href="https://github.com/rife2/rife2-template-renderers/wiki/rife.render.FormatCreditCard">rife.render.FormatCreditCard</a>
  * @since 1.0
  */
 public class FormatCreditCard implements ValueRenderer {

lib/src/main/java/rife/render/RenderUtils.java

@@ -81,7 +81,7 @@ public final class RenderUtils {
     /**
      * Returns the last 4 digits a credit card number. The number must satisfy the Luhn algorithm.
      * Non-digits are stripped from the number.
-     *
+     *Th
      * @param src the credit card number
      * @return the last 4 digits of the credit card number or empty
      */