apply suggestions from oli-obk

Co-authored-by: Oli Scherer <github35764891676564198441@oli-obk.de>

Author: nikomatsakis

compiler/rustc_borrowck/src/region_infer/mod.rs

@@ -1364,7 +1364,7 @@ impl<'tcx> RegionInferenceContext<'tcx> {
 
         let result = self.scc_values.contains_points(sup_region_scc, sub_region_scc);
         debug!(
-            "eval_outlives: returning {} because of comparison between points in sup/sub",
+            "returning {} because of comparison between points in sup/sub",
             result
         );
         result

compiler/rustc_infer/src/infer/outlives/obligations.rs

@@ -318,7 +318,7 @@ where
         self.delegate.push_verify(origin, generic, region, verify_bound);
     }
 
-    #[tracing::instrument(level = "Debug", skip(self))]
+    #[tracing::instrument(level = "debug", skip(self))]
     fn projection_must_outlive(
         &mut self,
         origin: infer::SubregionOrigin<'tcx>,
@@ -361,7 +361,7 @@ where
         // }` in the trait definition.
         approx_env_bounds.retain(|bound_outlives| {
             // OK to skip binder because we only manipulate and compare against other
-            // values from the same inder. e.g. if we have (e.g.) `for<'a> <T as Trait<'a>>::Item: 'a`
+            // values from the same binder. e.g. if we have (e.g.) `for<'a> <T as Trait<'a>>::Item: 'a`
             // in `bound`, the `'a` will be a `^1` (bound, debruijn index == innermost) region.
             // If the declaration is `trait Trait<'b> { type Item: 'b; }`, then `projection_declared_bounds_from_trait`
             // will be invoked with `['b => ^1]` and so we will get `^1` returned.

compiler/rustc_infer/src/infer/outlives/test_type_match.rs

@@ -34,7 +34,7 @@ use crate::infer::region_constraints::VerifyIfEq;
 /// like are used. This is a particular challenge since this function is invoked
 /// very late in inference and hence cannot make use of the normal inference
 /// machinery.
-#[tracing::instrument(level = "Debug", skip(tcx, param_env))]
+#[tracing::instrument(level = "debug", skip(tcx, param_env))]
 pub fn extract_verify_if_eq<'tcx>(
     tcx: TyCtxt<'tcx>,
     param_env: ty::ParamEnv<'tcx>,
@@ -63,7 +63,7 @@ pub fn extract_verify_if_eq<'tcx>(
 }
 
 /// True if a (potentially higher-ranked) outlives
-#[tracing::instrument(level = "Debug", skip(tcx, param_env))]
+#[tracing::instrument(level = "debug", skip(tcx, param_env))]
 pub(super) fn can_match_erased_ty<'tcx>(
     tcx: TyCtxt<'tcx>,
     param_env: ty::ParamEnv<'tcx>,
@@ -102,7 +102,7 @@ impl<'tcx> Match<'tcx> {
 
     /// Binds the pattern variable `br` to `value`; returns an `Err` if the pattern
     /// is already bound to a different value.
-    #[tracing::instrument(level = "Debug", skip(self))]
+    #[tracing::instrument(level = "debug", skip(self))]
     fn bind(
         &mut self,
         br: ty::BoundRegion,
@@ -167,7 +167,7 @@ impl<'tcx> TypeRelation<'tcx> for Match<'tcx> {
     #[instrument(skip(self), level = "debug")]
     fn tys(&mut self, pattern: Ty<'tcx>, value: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>> {
         if pattern == value {
-            return Ok(pattern);
+            Ok(pattern)
         } else {
             relate::super_relate_tys(self, pattern, value)
         }
@@ -181,7 +181,7 @@ impl<'tcx> TypeRelation<'tcx> for Match<'tcx> {
     ) -> RelateResult<'tcx, ty::Const<'tcx>> {
         debug!("{}.consts({:?}, {:?})", self.tag(), pattern, value);
         if pattern == value {
-            return Ok(pattern);
+            Ok(pattern)
         } else {
             relate::super_relate_consts(self, pattern, value)
         }