Document restrictions on integers in the version.

chrome/common/extensions/docs/static/manifest.html

Index: chrome/common/extensions/docs/static/manifest.html
===================================================================
--- chrome/common/extensions/docs/static/manifest.html	(revision 31304)
+++ chrome/common/extensions/docs/static/manifest.html	(working copy)
@@ -142,9 +142,16 @@
 <p>
 One to four dot-separated integers
 identifying the version of this extension.
-Examples:
+A couple of rules apply to the integers:
+they must be between 0 and 65535, inclusive,
+and non-zero integers can't start with 0.
+For example, 99999 and 032 are both invalid.
 </p>
 
+<p>
+Here are some examples of valid versions:
+</p>
+
 <ul>
   <li> <code>"version": "1"</code> </li>
   <li> <code>"version": "1.0"</code> </li>
@@ -166,12 +173,12 @@
 If those integers are equal,
 the integers to the right are compared,
 and so on.
-For example, 1.2.0 is a newer version than 1.1.9.99999.
+For example, 1.2.0 is a newer version than 1.1.9.9999.
 </p>
 
 <p>
 A missing integer is equal to zero.
-For example, 1.1.9.99999 is newer than 1.1.
+For example, 1.1.9.9999 is newer than 1.1.
 </p>
 
 <p>