Fix test case TestBug57294

ooxml/XSSF/UserModel/XSSFWorkbook.cs

@@ -341,11 +341,11 @@ namespace NPOI.XSSF.UserModel
                     else if (p is MapInfo) mapInfo = (MapInfo)p;
                     else if (p is XSSFSheet)
                     {
-                        shIdMap.Add(rp.Relationship.Id, (XSSFSheet)p);
+                        shIdMap[rp.Relationship.Id] = (XSSFSheet)p;
                     }
                     else if (p is ExternalLinksTable)
                     {
-                        elIdMap.Add(rp.Relationship.Id, (ExternalLinksTable)p);
+                        elIdMap[rp.Relationship.Id] = (ExternalLinksTable)p;
                     }
                 }
 

testcases/ooxml/XSSF/UserModel/TestUnfixedBugs.cs

@@ -350,8 +350,9 @@ namespace TestCases.XSSF.UserModel
 
             ICell cell = row.GetCell(0);
             Assert.IsNotNull(cell, "Expecting cell at rownum " + rowNum);
-            Assert.AreEqual(contents + ".0", cell.ToString(),
-                "Did not have expected contents at rownum " + rowNum);
+            //why concate ".0"? There is no ".0" in excel.
+            Assert.AreEqual(contents, cell.ToString(), "Did not have expected contents at rownum " + rowNum);
+            //Assert.AreEqual(contents + ".0", cell.ToString(), "Did not have expected contents at rownum " + rowNum);
         }
 
         [Test]