Issue #1987396 by joelpittet, andypost, jenlampton, Hydra, larowlan, Cottser, brunodbo: Refactor & Clean-up comment.module theme functions.
Issue #2170435 by Xano, EclipseGc: PluginManagerBase::processDefinition() fails when plugin definitions are not arrays.
Issue #2042773 by yched, Berdir, pcambra: Change #items within a theme_field() render array from an *array* to the same $items *object* used throughout the rest of the formatter pipeline.