Merge #10418

10418: Add whitespace between lifetime and mut keyword in "expand macro" command r=lnicola a=nathanwhit

Before, we were only adding whitespace between a lifetime and the following ident, which produced invalid code for mutable references.

Before this PR:
```rust
macro_rules! foo {
    () => {
        pub struct Foo<'a> {
            foo: &'a mut str,
        }
    };
}
foo!(); // <- expand macro here
```
expanded to
```rust
pub struct Foo< 'a>{
  foo: & 'amut str,
}
```

with this PR, it expands to
```rust
pub struct Foo< 'a>{
  foo: & 'a mut str,
}
```

Co-authored-by: nathan.whitaker <nathan.whitaker01@gmail.com>

0 files changed, 0 insertions, 0 deletions