Case T-1/15: Judgment of the General Court of 6 July 2017 — SNCM v Commission (State aid — Aid measures implemented by France in favour of SNCM — Restructuring aid and mesures taken in the context of a privatisation plan — Private investor in a market economy test — Decision declaring the aid unlawful and incompatible with the internal market — Social policy of the Member States — Re-opening of the formal investigation procedure — Obligation to state reasons — Equal treatment — Article 41 of the Charter of Fundamental Rights)