Put lhs and rhs of binop on the same line if lhs is short
@@ -352,9 +352,11 @@ where
.and_then(|s| s.sub_width(pp.suffix.len()))
.and_then(|rhs_shape| rhs.rewrite(context, rhs_shape));
if let Some(ref rhs_result) = rhs_orig_result {
- // If the rhs looks like block expression, we allow it to stay on the same line
- // with the lhs even if it is multi-lined.
- let allow_same_line = rhs_result
+ // If the length of the lhs is equal to or shorter than the tab width or
+ // the rhs looks like block expression, we put the rhs on the same
+ // line with the lhs even if the rhs is multi-lined.
+ let allow_same_line = lhs_result.len() <= context.config.tab_spaces()
+ || rhs_result
.lines()
.next()
.map(|first_line| first_line.ends_with('{'))
