Some more #ThreadSafe# tags per LANG-370

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@918373 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/lang3/CharRange.java

@@ -25,6 +25,7 @@
  * 
  * <p>Instances are immutable.</p>
  *
+ * <p>#ThreadSafe#
  * @author Apache Software Foundation
  * @author Chris Feldhacker
  * @author Gary Gregory

src/main/java/org/apache/commons/lang3/CharSet.java

@@ -28,6 +28,7 @@
  *
  * <p>Instances are immutable, but instances of subclasses may not be.</p>
  *
+ * <p>#ThreadSafe#
  * @author Apache Software Foundation
  * @author Phil Steitz
  * @author Pete Gieser

src/main/java/org/apache/commons/lang3/Range.java

@@ -22,6 +22,7 @@
 /**
  * <p><code>Range</code> represents an immutable range of numbers of the same type.</p>
  * 
+ * <p>#ThreadSafe#
  * @author Apache Software Foundation
  * @since 3.0
  * @version $Id: Range.java 830032 2009-10-27 00:15:00Z scolebourne $

src/main/java/org/apache/commons/lang3/SerializationException.java

@@ -21,6 +21,7 @@
  *
  * <p>The original error is wrapped within this one.</p>
  *
+ * <p>#ThreadSafe#
  * @author Apache Software Foundation
  * @since 1.0
  * @version $Id$

src/main/java/org/apache/commons/lang3/Validate.java

@@ -38,6 +38,7 @@
  * Validate.notNull(surname, "The surname must not be %s", null);
  * </pre>
  * 
+ * <p>#ThreadSafe#
  * @author Apache Software Foundation
  * @author <a href="mailto:ola.berg@arkitema.se">Ola Berg</a>
  * @author Gary Gregory