Introduce MessageFormatUtil class for locale independent string formatting

Autoported commit.
Original commit hash: [cb37a0b34f]

Author: yulian-gaponenko

itext/itext.io/itext/io/util/MessageFormatUtil.cs

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+/*
+
+This file is part of the iText (R) project.
+Copyright (c) 1998-2017 iText Group NV
+Authors: Bruno Lowagie, Paulo Soares, et al.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License version 3
+as published by the Free Software Foundation with the addition of the
+following permission added to Section 15 as permitted in Section 7(a):
+FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
+ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
+OF THIRD PARTY RIGHTS
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.
+See the GNU Affero General Public License for more details.
+You should have received a copy of the GNU Affero General Public License
+along with this program; if not, see http://www.gnu.org/licenses or write to
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA, 02110-1301 USA, or download the license from the following URL:
+http://itextpdf.com/terms-of-use/
+
+The interactive user interfaces in modified source and object code versions
+of this program must display Appropriate Legal Notices, as required under
+Section 5 of the GNU Affero General Public License.
+
+In accordance with Section 7(b) of the GNU Affero General Public License,
+a covered work must retain the producer line in every PDF that is created
+or manipulated using iText.
+
+You can be released from the requirements of the license by purchasing
+a commercial license. Buying such a license is mandatory as soon as you
+develop commercial activities involving the iText software without
+disclosing the source code of your own applications.
+These activities include: offering paid services to customers as an ASP,
+serving PDFs on the fly in a web application, shipping iText with a closed
+source product.
+
+For more information, please contact iText Software Corp. at this
+address: [email protected]
+*/
+using System;
+using System.Globalization;
+using System.Text;
+
+namespace iText.IO.Util {
+    /// <summary>This file is a helper class for internal usage only.</summary>
+    /// <remarks>
+    /// This file is a helper class for internal usage only.
+    /// Be aware that it's API and functionality may be changed in future.
+    /// </remarks>
+    public class MessageFormatUtil {
+        public static String Format(String pattern, params Object[] arguments) {
+            StringBuilder sb = new StringBuilder(pattern.Length + arguments.Length * 8);
+            sb.AppendFormat(CultureInfo.InvariantCulture, pattern, arguments);
+            return sb.ToString();
+        }
+    }
+}

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