Convert simple `if` to `or` on assignment

So like

```ruby
x = something ? this : that
puts x
```

becomes

```ruby
x = something ? this : that
puts(this or that)
```

instead of

```ruby
x = something ? this : that
puts(something? this : that)
```

Also,

```ruby
x = 1 if something
puts x
```

becomes

```
x = 1 if something
puts 1
```