Temporarily replace RangeEnd::Included with _

[Badel2]

Hi! I'm currently adding support for ..= syntax as a synonym for ...: rust-lang/rust#44709
I made a small change in HIR the AST which prevents rustfmt from compiling, however with this workaround it will compile without errors, in both old and new versions of rustc. Once the PR gets merged, I will fix this. Basically the change in HIR the AST is the new RangeSyntax enum:

enum RangeEnd {
   // Included,
   Included(RangeSyntax),
   Excluded,
}

enum RangeSyntax {
   DotDotDot, // ...
   DotDotEq,  // ..=
}

[topecongiro]

Thank you!