Update PApplet.java: remove unmatched closing tag

Author: Konsl

core/src/processing/core/PApplet.java

@@ -913,7 +913,7 @@ void handleSettings() {
    * Processing Development Environment (PDE). For example, when
    * using the Eclipse code editor, it's necessary to use
    * <b>settings()</b> to define the <b>size()</b> and
-   * <b>smooth()</b> values for a sketch.</b>.
+   * <b>smooth()</b> values for a sketch.
    * <br /> <br />
    * The <b>settings()</b> method runs before the sketch has been
    * set up, so other Processing functions cannot be used at that