Case C-765/18: Judgment of the Court (Seventh Chamber) of 2 April 2020 (request for a preliminary ruling from the Landgericht Koblenz — Germany) — Stadtwerke Neuwied GmbH v RI (Reference for a preliminary ruling — Directive 2003/55/EC — Common rules for the internal market in natural gas — Consumer protection — Article 3(3) and point (b) of Annex A — Transparency of contractual terms and conditions — Obligation to give consumers adequate notice directly of an increase in charges)