tweaking the text.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@33623 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/model/AbstractProject/help-assignedLabelString.html

@@ -11,7 +11,6 @@
     <h3>Valid Operators</h3>
     <p>
     The following operators are supported, in the order of precedence.
-    An expression can contain whitespace for better readability, and it'll be ignored.
     <dl>
         <dt>(expr)</dt>
         <dd>parenthesis</dd>
@@ -19,7 +18,7 @@
         <dt>!expr</dt>
         <dd>negation</dd>
     
-        <dt>expr&expr</dt>
+        <dt>expr&amp;expr</dt>
         <dd>
             and
         </dd>
@@ -38,9 +37,12 @@
 
         <dt>a &lt;-> b</dt>
         <dd>
-            "if and only if" operator. Equivalent to <tt>a&b |!a&!b</tt>.
+            "if and only if" operator. Equivalent to <tt>a&amp;b |!a&amp;!b</tt>.
             For example, <tt>windows->sfbay</tt> could be thought of as "if run on a Windows slave,
             that slave must be in the SF bay area, but if not on Windows, it must not be in the bay area."
         </dd>
     </dl>
+    <p>
+    All operators are left-associative (i.e., a->b->c &lt;-> (a->b)->c )
+    An expression can contain whitespace for better readability, and it'll be ignored.
 </div>
\ No newline at end of file