Iss #70 - Add logging helper to the common lib

To centralize the fix for formatting user-defined inputs in logging statements, the new helper was created.

Resolves #70 (closed)

core/src/main/java/org/eclipsefoundation/core/helper/LoggingHelper.java

+/**
+ * Copyright (c) 2023 Eclipse Foundation
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * Author: Martin Lowe <martin.lowe@eclipse-foundation.org>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.eclipsefoundation.core.helper;
+
+/**
+ * Helpers for use in formatting log messages.
+ * 
+ * @author Martin Lowe
+ */
+public final class LoggingHelper {
+
+    /**
+     * Formats the message part to remove newline characters. This is meant to be used for user-defined fields to prevent
+     * logging injections.
+     * 
+     * @param msg the message part to format
+     * @return the sanitized log part.
+     */
+    public static String format(String msg) {
+        if (msg == null) {
+            return "";
+        }
+        return msg.replaceAll("[\\n\\r]", "__");
+    }
+
+    private LoggingHelper() {
+    }
+}