Apply fmt

Author: mu001999

compiler/rustc_infer/src/infer/relate/combine.rs

@@ -454,10 +454,7 @@ impl<'infcx, 'tcx> CombineFields<'infcx, 'tcx> {
         // adding constraints like `'x: '?2` and `?1 <: ?3`.)
         let Generalization { value_may_be_infer: b_ty, needs_wf } = generalize::generalize(
             self.infcx,
-            &mut CombineDelegate {
-                infcx: self.infcx,
-                span: self.trace.span(),
-            },
+            &mut CombineDelegate { infcx: self.infcx, span: self.trace.span() },
             a_ty,
             b_vid,
             ambient_variance,