Following the JLS suggestions.

Author: ppisl

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/zipimporter/PZipImporter.java

@@ -43,7 +43,7 @@
 
 public class PZipImporter extends PythonBuiltinObject {
 
-    public final static String SEPARATOR = File.separator;
+    public static final String SEPARATOR = File.separator;
 
     /**
      * pathname of the Zip archive