Fix markup in sophia_features.md (#437)

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Denis Davidyuk 2023-02-15 14:27:29 +04:00 committed by GitHub
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@ -256,10 +256,10 @@ datatype bi('a) = Bi // bi is bivariant on 'a
The following facts apply here:
- `co('a)` is a subtype of `co('b) when `'a` is a subtype of `'b`
- `ct('a)` is a subtype of `ct('b) when `'b` is a subtype of `'a`
- `in('a)` is a subtype of `in('b) when `'a` is equal to `'b`
- `bi('a)` is a subtype of `bi('b) always
- `co('a)` is a subtype of `co('b)` when `'a` is a subtype of `'b`
- `ct('a)` is a subtype of `ct('b)` when `'b` is a subtype of `'a`
- `in('a)` is a subtype of `in('b)` when `'a` is equal to `'b`
- `bi('a)` is a subtype of `bi('b)` always
That altogether induce the following rules of subtyping in Sophia: