Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2507031 by claudiu.cristea, dawehner, Wim Leers, mitrpaka, webflo, catch, piyuesh23, beejeebus, Berdir: Optimize automatic cron subscriber by moving automatic cron to a module

Revert "Issue #2507031 by claudiu.cristea, dawehner, Wim Leers, mitrpaka, webflo, catch, piyuesh23, beejeebus: Optimize automatic cron subscriber by moving automatic cron to a module"

This reverts commit 6e0ce080.

Issue #2507031 by claudiu.cristea, dawehner, Wim Leers, mitrpaka, webflo, catch, piyuesh23, beejeebus: Optimize automatic cron subscriber by moving automatic cron to a module