Function rustfmt_nightly::expr::rewrite_assign_rhs_expr

pub(crate) fn rewrite_assign_rhs_expr<R: Rewrite>(
    context: &RewriteContext<'_>, 
    lhs: &str, 
    ex: &R, 
    shape: Shape, 
    rhs_tactics: RhsTactics
) -> Option<String>