Fix stupid typo.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1717608 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/collections4/ClosureUtils.java

@@ -46,7 +46,7 @@ import org.apache.commons.collections4.functors.WhileClosure;
  * <li>Exception - always throws an exception
  * </ul>
  * <p>
- * Since v4.1 only closures which are considered to be unsafe are
+ * Since v4.1 only closures which are considered to be safe are
  * Serializable. Closures considered to be unsafe for serialization are:
  * <ul>
  * <li>Invoker

src/main/java/org/apache/commons/collections4/FactoryUtils.java

@@ -32,7 +32,7 @@ import org.apache.commons.collections4.functors.PrototypeFactory;
  * <li>Exception - always throws an exception
  * </ul>
  * <p>
- * Since v4.1 only factories which are considered to be unsafe are
+ * Since v4.1 only factories which are considered to be safe are
  * Serializable. Factories considered to be unsafe for serialization are:
  * <ul>
  * <li>Prototype

src/main/java/org/apache/commons/collections4/TransformerUtils.java

@@ -57,7 +57,7 @@ import org.apache.commons.collections4.functors.SwitchTransformer;
  * <li>StringValue - returns a <code>java.lang.String</code> representation of the input object
  * </ul>
  * <p>
- * Since v4.1 only transformers which are considered to be unsafe are
+ * Since v4.1 only transformers which are considered to be safe are
  * Serializable. Transformers considered to be unsafe for serialization are:
  * <ul>
  * <li>Invoker