Fix compiler warning

src/main/java/org/apache/commons/beanutils2/BeanUtilsBean.java

@@ -36,7 +36,7 @@
  *
  * <p>This class provides implementations for the utility methods in
  * {@link BeanUtils}.
- * Different instances can be used to isolate caches between classloaders
+ * Different instances can be used to isolate caches between class loaders
  * and to vary the value converters registered.</p>
  *
  * @see BeanUtils

src/main/java/org/apache/commons/beanutils2/ContextClassLoaderLocal.java

@@ -27,7 +27,7 @@
  * <p>Occasionally it is necessary to store data in "global" variables
  * (including uses of the Singleton pattern). In applications which have only
  * a single classloader such data can simply be stored as "static" members on
- * some class. When multiple classloaders are involved, however, this approach
+ * some class. When multiple class loaders are involved, however, this approach
  * can fail; in particular, this doesn't work when the code may be run within a
  * servlet container or a j2ee container, and the class on which the static
  * member is defined is loaded via a "shared" classloader that is visible to all

src/main/java/org/apache/commons/beanutils2/MethodUtils.java

@@ -155,7 +155,7 @@ public int hashCode() {
      * shared classloader because it is keyed via a MethodDescriptor object
      * which has a Class as one of its members and that member is used in
      * the MethodDescriptor.equals method. So two components that load the same
-     * class via different classloaders will generate non-equal MethodDescriptor
+     * class via different class loaders will generate non-equal MethodDescriptor
      * objects and hence end up with different entries in the map.
      */
     private static final Map<MethodDescriptor, Reference<Method>> cache = Collections