fix some typos.

Author: hfutatzhanghb

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/TrashPolicyDefault.java

@@ -384,7 +384,7 @@ private void deleteCheckpoint(Path trashRoot, boolean deleteImmediately)
       } catch (ParseException e) {
         if (cleanNonCheckpointUnderTrashRoot) {
           fs.delete(path, true);
-          LOG.warn("Unexpected item in trash: " + dir + ". Force to delete it.");
+          LOG.warn("Unexpected item in trash: " + dir + ". Deleting.");
           continue;
         } else {
           LOG.warn("Unexpected item in trash: " + dir + ". Ignoring.");

hadoop-common-project/hadoop-common/src/main/resources/core-default.xml

@@ -977,8 +977,8 @@
 <property>
   <name>fs.trash.clean.trashroot.enable</name>
   <value>false</value>
-  <description>Whether clean some directories or files
-    at home of Trash which are not under checkpoint directory or not.
+  <description>Whether clean some directories and files
+    in Trash home which are not under checkpoint directory.
   </description>
 </property>
 

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestTrash.java

@@ -788,7 +788,7 @@ public void testTrashEmptier() throws Exception {
   }
 
   /**
-   * Test trash emptier can whether delete non-checkpoint dir or not.
+   * Test trash emptier can delete non-checkpoint dir or not.
    * @throws Exception
    */
   @Test()