Render all expressions in the slice, keeping empty lines where appropriate
fn renderExpressions(r: *Render, expressions: []const Ast.Node.Index, space: Space) Error!void
fn renderExpressions(r: *Render, expressions: []const Ast.Node.Index, space: Space) Error!void {
if (expressions.len == 0) return;
try renderExpression(r, expressions[0], space);
for (expressions[1..]) |expression| {
try renderExtraNewline(r, expression);
try renderExpression(r, expression, space);
}
}