+* RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
+ wikitext table captions, wikitext table headings, wikitext table cells. HTML
+ headings, HTML list items, HTML table captions, HTML table headings, HTML table cells
+ will not have this trimming behavior.
+* Calling Database::begin() explicitly during an implicit transaction or when DBO_TRX
+ is set results in an exception. Calling Database::commit() explicitly for an implicit
+ transaction also results in an exception. Previously these were logged as errors.
+ The startAtomic() and endAtomic() methods, or AtomicSectionUpdate should be used
+ instead.