Issue #2318779 by Devin Carlson: [Meta] Aggregator Module: Fix documentation that refers to enabling/disabling of modules
Issue #2349633 by mortendk, runand, bradwade, emma.maria: Copy book templates to Classy
Issue #2373735 by joelpittet, dawehner: Simplify/clean up BareHtmlPageRenderer
Issue #2376791 by dawehner, Wim Leers: Move all _content routing definitions to _controller
Issue #2328919 by Mile23, YesCT, tim.plunkett: Remove () from a bunch of @covers definitions in PHPUnit
Issue #2141417 by babruix, Sam152, jessebeach: Trays without headings throw a JavaScript error when the non-existent heading text is accessed
Issue #2375245 by ashutoshsngh: Remove form_set_value()