Merge #3745

3745: Fix merge-imports assist for wildcard imports r=matklad a=piotr-szpetkowski

Refs #3728 

Besides the case mentioned in issue merging two diff-prefix wildcard uses will now work as well e.g. 

```rust
use std::cell::*;
use std::str::*;
```

will translate into:

```rust
use std::{cell::*, str::*}
```

I'd also like to explore usage of the `merge-imports` for same-prefix uses to simplify redundancy, but it seems like an idea for another issue and I'm not sure if it's something that this assist should do e.g.:

```rust
use std::cell::Cell;
use std::cell::*;
```

into:

```rust
use std::cell::*;
```

Co-authored-by: Piotr Szpetkowski <[email protected]>

0 files changed, 0 insertions, 0 deletions