fixup2 iter region_constraints

Author: aliemjay

compiler/rustc_infer/src/infer/region_constraints/leak_check.rs

@@ -412,11 +412,9 @@ impl<'tcx> MiniGraph<'tcx> {
         };
 
         if let Some(snapshot) = only_consider_snapshot {
-            for constraint in region_constraints
+            region_constraints
                 .region_constraints_in_snapshot(&snapshot.region_constraints_snapshot)
-            {
-                each_constraint(constraint);
-            }
+                .for_each(each_constraint);
         } else {
             region_constraints
                 .data()

compiler/rustc_infer/src/infer/region_constraints/mod.rs

@@ -3,9 +3,7 @@
 use self::CombineMapType::*;
 use self::UndoLog::*;
 
-use super::{
-    InferCtxtUndoLogs, MiscVariable, RegionVariableOrigin, Rollback, SubregionOrigin,
-};
+use super::{InferCtxtUndoLogs, MiscVariable, RegionVariableOrigin, Rollback, SubregionOrigin};
 
 use rustc_data_structures::fx::FxIndexMap;
 use rustc_data_structures::intern::Interned;