Merge pull request #3472 from jsoref/patch-1

Update help-quietPeriod.html

core/src/main/resources/jenkins/model/GlobalQuietPeriodConfiguration/help-quietPeriod.html

 <div>
-  When this option is checked, newly triggered builds of this project will be
+  When this option non-zero, newly triggered builds of this project will be
   added to the queue, but Jenkins will wait for the specified period of time
-  before actually starting the build.
+  (in seconds) before actually starting the build.
   <p>
   For example, if your builds take a long time to execute, you may want to
   prevent multiple source control commits that are made at approximately the
@@ -15,9 +15,6 @@
   If a new build of this project is triggered while a build is already sitting
   in the queue, waiting for its quiet period to end, the quiet period will not
   be reset.  The newly triggered build will not be added to the queue, unless
-  this project is parameterized and the build has different parameters to the
+  this project is parameterized and the build has different parameters than the
   build already in the queue.
-  <p>
-  If this option is not checked, then the system-wide default value from the
-  <i>Configure System</i> screen will be used.
-  </div>
+</div>