introduced deparser and toString correction for insert output clause

Author: wumpz

src/main/java/net/sf/jsqlparser/statement/insert/Insert.java

@@ -255,6 +255,10 @@ public String toString() {
         if (columns != null) {
             sql.append(PlainSelect.getStringList(columns, true, true)).append(" ");
         }
+        
+        if (outputClause !=null) {
+            sql.append(outputClause.toString());
+        }
 
         if (select != null) {
             sql.append(select);

src/main/java/net/sf/jsqlparser/util/deparser/InsertDeParser.java

@@ -76,6 +76,10 @@ public void deParse(Insert insert) {
             }
             buffer.append(")");
         }
+        
+        if (insert.getOutputClause() != null) {
+            buffer.append(insert.getOutputClause().toString());
+        }
 
         if (insert.getSelect() != null) {
             buffer.append(" ");

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -1821,14 +1821,9 @@ Select SelectWithWithItems( ):
     List<WithItem> with = null;
 }
 {
-    // LOOKAHEAD(2) ( 
-    //    "(" with=WithList()  select = Select( with ) ")" { select.withUsingWithBrackets(true); }
-    //)
-    //|
-    //(
-        [ with=WithList() ] 
-        select = Select( with )
-    //)
+    (LOOKAHEAD(2) (  "(" with=WithList()  select = Select( with ) ")" { select.withUsingWithBrackets(true); }   )
+    |
+    (  [with=WithList()] select = Select( with )  ))
     {
             return select;
     }

src/test/java/net/sf/jsqlparser/statement/insert/InsertTest.java

@@ -254,7 +254,7 @@ public void testInsertSelect() throws JSQLParserException {
     @Test
     public void testInsertWithSelect() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("INSERT INTO mytable (mycolumn) WITH a AS (SELECT mycolumn FROM mytable) SELECT mycolumn FROM a", true);
-        //assertSqlCanBeParsedAndDeparsed("INSERT INTO mytable (mycolumn) (WITH a AS (SELECT mycolumn FROM mytable) SELECT mycolumn FROM a)", true);
+        assertSqlCanBeParsedAndDeparsed("INSERT INTO mytable (mycolumn) (WITH a AS (SELECT mycolumn FROM mytable) SELECT mycolumn FROM a)", true);
     }
 
     @Test
@@ -446,7 +446,7 @@ public void testInsertUnionSelectIssue1491() throws JSQLParserException {
         );
     }
 
-    //@Test
+    @Test
     public void testInsertOutputClause() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed(
                 "INSERT INTO dbo.EmployeeSales (LastName, FirstName, CurrentSales)  \n" +