Upgrader: Copy wp-includes/version.php over last, to avoid an installation failing with the new version.php in place. Fixes #25860


git-svn-id: https://develop.svn.wordpress.org/trunk@27336 602fd350-edb4-49c9-b593-d223f7449a82
Upgrader: Remove two stray spaces. See #25860


git-svn-id: https://develop.svn.wordpress.org/trunk@27337 602fd350-edb4-49c9-b593-d223f7449a82
Upgrader: Remove some debug from r27336. See #25860


git-svn-id: https://develop.svn.wordpress.org/trunk@27338 602fd350-edb4-49c9-b593-d223f7449a82
Upgrader: Remove more debug from r27336. See #25860


git-svn-id: https://develop.svn.wordpress.org/trunk@27339 602fd350-edb4-49c9-b593-d223f7449a82