Replace another generated ArrayList with a singletonList

src/main/java/org/sablecc/sablecc/parser/Parser.java

@@ -6,7 +6,6 @@ import java.io.DataInputStream;
 import java.io.BufferedInputStream;
 import java.io.InputStream;
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.LinkedList;
@@ -216,8 +215,7 @@ public class Parser implements IParser
             {
                 case SHIFT:
                 {
-                    List<Object> list = new ArrayList<Object>();
-                    list.add(this.lexer.next());
+                    List<Object> list = Collections.<Object>singletonList(this.lexer.next());
                     push(destination, list);
                 }
                 break;

src/main/resources/org/sablecc/sablecc/parser.txt

@@ -14,7 +14,6 @@ import java.io.DataInputStream;
 import java.io.BufferedInputStream;
 import java.io.InputStream;
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.LinkedList;
@@ -259,8 +258,7 @@ Macro:ParserCommon
             {
                 case SHIFT:
                 {
-                    List<Object> list = new ArrayList<Object>();
-                    list.add(this.lexer.next());
+                    List<Object> list = Collections.<Object>singletonList(this.lexer.next());
                     push(destination, list$1$);
                 }
                 break;