Changed variable declaration and assignment to one line.

Autoported commit.
Original commit hash: [4698b47c9]

Author: kevinwillems1993

itext.tests/itext.kernel.tests/itext/kernel/utils/PdfMergerTest.cs

@@ -235,10 +235,9 @@ public virtual void MergeTableWithEmptyTdTest() {
             merger.Close();
             output.Close();
             CompareTool compareTool = new CompareTool();
-            String errorMessage = "";
             String tagStructErrorMessage = compareTool.CompareTagStructures(resultFile, sourceFolder + "cmp_tableWithEmptyTd.pdf"
                 );
-            errorMessage += tagStructErrorMessage == null ? "" : tagStructErrorMessage + "\n";
+            String errorMessage = tagStructErrorMessage == null ? "" : tagStructErrorMessage + "\n";
             if (!String.IsNullOrEmpty(errorMessage)) {
                 NUnit.Framework.Assert.Fail(errorMessage);
             }

port-hash

@@ -1 +1 @@
-db0fb68a039469dbe8f13366ce362b74e639d6c6
+4698b47c9115e0afcd4307fe63804dfade8c9661