[ticket/12722] Add Generic.Formatting.SpaceAfterCast in the legacy ruleset

PHPBB3-12722
Merge pull request #2604 from Nicofuma/ticket/12722

[ticket/12722] Add Generic.Formatting.SpaceAfterCast in the legacy ruleset

* Nicofuma/ticket/12722:
  [ticket/12722] Add Generic.Formatting.SpaceAfterCast in the legacy ruleset