if !differing_macro_contexts(first.span, second.span);
if let ExprKind::Assign(ref lhs0, ref rhs0, _) = first.kind;
if let ExprKind::Assign(ref lhs1, ref rhs1, _) = second.kind;
if !differing_macro_contexts(first.span, second.span);
if let ExprKind::Assign(ref lhs0, ref rhs0, _) = first.kind;
if let ExprKind::Assign(ref lhs1, ref rhs1, _) = second.kind;