refactoring

Author: raydac

src/main/java/com/igormaznitsa/prologparser/DefaultParserContext.java

@@ -38,7 +38,7 @@
 
 public class DefaultParserContext implements ParserContext {
 
-  private static final Op[] EMPTY = new Op[0];
+  protected static final Op[] EMPTY = new Op[0];
   protected final Set<String> opPrefixes = new HashSet<>();
   protected final Map<String, OpContainer> opContainers = new HashMap<>();
   protected final int flags;

src/main/java/com/igormaznitsa/prologparser/terms/Quotation.java

@@ -55,6 +55,7 @@ public enum Quotation {
 
   /**
    * Get quotation mark.
+   *
    * @return the quotation mark as string
    */
   public String getQuotationMark() {
@@ -63,6 +64,7 @@ public String getQuotationMark() {
 
   /**
    * Quotate string.
+   *
    * @param str string to quotate, can be null
    * @return quotated string
    */