(bug 42410) Add $pageObj->clear() for newtimestamp

To return latest timestamp

Change-Id: I1d28164d89917152d3f712817a125c8be36f390d

RELEASE-NOTES-1.21

@@ -83,6 +83,7 @@ production.
 * (bug 42173) Removed namespace prefixes on Special:UncategorizedCategories.
 * (bug 36053) Log in "returnto" feature forgets query parameters if no
   title parameter was specified.
+* (bug 42410) API action=edit now returns correct timestamp for the new edit.
 
 === API changes in 1.21 ===
 * prop=revisions can now report the contentmodel and contentformat, see docs/contenthandler.txt.

includes/api/ApiEditPage.php

@@ -407,6 +407,7 @@ class ApiEditPage extends ApiBase {
 				} else {
 					$r['oldrevid'] = intval( $oldRevId );
 					$r['newrevid'] = intval( $newRevId );
+					$pageObj->clear();
 					$r['newtimestamp'] = wfTimestamp( TS_ISO_8601,
 						$pageObj->getTimestamp() );
 				}