DOC: Say how the Preference Management Platform decides to add this script, as it now does

JavaScriptResource.mustache

@@ -1463,15 +1463,14 @@ fiftyoneDegreesManager = function() {
 }
 
 // Loading the script twice replaces the first instance and its state. The
-// Preference Management Platform adds this script only where the page's
-// document carries no client script tag, and where a tag is there it waits
-// for that tag to run, so that convenience never trips this warning and
-// nobody should "fix" it to allow for it. The value is tested and not the
-// property, because var {{_objName}} at the top level creates the global
-// property with the value undefined before any statement runs, so testing
-// the property would warn on every load. The text names the object and
-// nothing else, because printing the existing object would print its
-// payload, identifiers included.
+// Preference Management Platform adds this script only where, once the
+// page has loaded, no client script object is on it, so that convenience
+// never trips this warning and nobody should "fix" it to allow for it.
+// The value is tested and not the property, because var {{_objName}} at
+// the top level creates the global property with the value undefined
+// before any statement runs, so testing the property would warn on every
+// load. The text names the object and nothing else, because printing the
+// existing object would print its payload, identifiers included.
 if (typeof window !== 'undefined' &&
     typeof window["{{_objName}}"] !== 'undefined') {
     console.warn("51Degrees: {{_objName}} already exists on this page. Loading the script twice replaces it. Load it once and call {{_objName}}.refresh() to update.");