Apply fix on all occurrence (ref. r1636697)

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1636852 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 05dc412531103bc4092e941aa2df2e229c5c4dd0
diff --git a/xdocs/usermanual/component_reference.xml b/xdocs/usermanual/component_reference.xml
index 43559d8..2ed08f9 100644
--- a/xdocs/usermanual/component_reference.xml
+++ b/xdocs/usermanual/component_reference.xml
@@ -1643,11 +1643,11 @@
       Default value is 2000 ms.
   </property>
   <property name="Expiration" required="No">
-      The expiration time (in milliseconds) of the message before become obsolete.
+      The expiration time (in milliseconds) of the message before it becomes obsolete.
       If you do not specify an expiration time, the default value is 0 (never expires). 
   </property>
   <property name="Priority" required="No">
-      The level priority of the message. They have ten levels of priority from 0 (lowest) to 9 (highest). 
+      The priority level of the message. There are ten priority levels from 0 (lowest) to 9 (highest). 
       If you do not specify a priority level, the default level is 4. 
   </property>
   <property name="Use non-persistent delivery mode?" required="Yes">