Comments in imports are formatted incorrectly

[rsammelson]

Examples:

use std::{
    fs,
    // (temporarily commented, we'll need this again in a second) io,
};

use foo::{
    self // this is important
};

Becomes:

use std::fs;

use foo::{self, // this is important};

Which now has syntax errors.

[okaneco]

I ran into this issue and a similar issue that resulted in unexpected and unwanted behavior.

Formatting deletes the import if all of the items are commented out.

Before

use std::fs::{
    // File
};

After

Expected

use std::fs::{
    // File
};