When an implicit array is used in a write, is causes the whole
expression to become a statement. For example:

```ruby
a = *b
a = 1, 2, 3
```

Even though these expressions are exactly equivalent to their
explicit array counterparts:

```ruby
a = [*b]
a = [1, 2, 3]
```

As such, these expressions cannot be joined with other expressions
by operators or modifiers except if, unless, while, until, or
rescue.

https://github.com/ruby/prism/commit/7cd2407272