message: Remove now redundant `inline` specification
  A `constexpr` function is implicitly `inline`.
diff: @@ -80,12 +80,12 @@ struct StorableResources
  };
  -constexpr inline StorableResources operator+(StorableResources lhs, const StorableResources& rhs)
  +constexpr StorableResources operator+(StorableResources lhs, const StorableResources& rhs)
  {
  return lhs += rhs;
  }
  -constexpr inline StorableResources operator-(StorableResources lhs, const StorableResources& rhs)
  +constexpr StorableResources operator-(StorableResources lhs, const StorableResources& rhs)
  {
  return lhs -= rhs;
  }
  