Merge "Simplify PHP by using ?? and ?:"

diff --cc includes/Block.php
Simple merge

diff --cc includes/CommentStore.php
Simple merge

diff --cc includes/EditPage.php
Simple merge

diff --cc includes/Storage/RevisionStore.php
Simple merge

diff --cc includes/api/ApiQueryAllDeletedRevisions.php
Simple merge

diff --cc includes/api/ApiQueryImageInfo.php
Simple merge

diff --cc includes/db/CloneDatabase.php
Simple merge

diff --cc includes/logging/LogEntry.php
Simple merge