Fix style

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/lib/PyObjectRichCompareBool.java

@@ -79,7 +79,7 @@
  */
 public abstract class PyObjectRichCompareBool {
     @SuppressWarnings("unused")
-    protected static abstract class ComparisonBaseNode extends PNodeWithContext {
+    protected abstract static class ComparisonBaseNode extends PNodeWithContext {
         public abstract boolean execute(Frame frame, Object a, Object b);
 
         protected boolean op(boolean a, boolean b) {