diff --git a/compiler/rustc_mir_build/src/build/expr/into.rs b/compiler/rustc_mir_build/src/build/expr/into.rs
index 3298d1c61aa..235fe14cbf9 100644
--- a/compiler/rustc_mir_build/src/build/expr/into.rs
+++ b/compiler/rustc_mir_build/src/build/expr/into.rs
@@ -275,7 +275,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 let fields: Vec<_> = if let Some(FruInfo { base, field_types }) = base {
                     let place_builder = unpack!(block = this.as_place_builder(block, base));
 
-
                     // MIR does not natively support FRU, so for each
                     // base-supplied field, generate an operand that
                     // reads it from the base.
diff --git a/compiler/rustc_mir_build/src/build/matches/mod.rs b/compiler/rustc_mir_build/src/build/matches/mod.rs
index 0e1d5b2b7ca..fde007ec011 100644
--- a/compiler/rustc_mir_build/src/build/matches/mod.rs
+++ b/compiler/rustc_mir_build/src/build/matches/mod.rs
@@ -1422,12 +1422,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         match test.kind {
             TestKind::SwitchInt { switch_ty, ref mut options } => {
                 for candidate in candidates.iter() {
-                    if !self.add_cases_to_switch(
-                        &match_place,
-                        candidate,
-                        switch_ty,
-                        options,
-                    ) {
+                    if !self.add_cases_to_switch(&match_place, candidate, switch_ty, options) {
                         break;
                     }
                 }
@@ -1842,14 +1837,11 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             // ```
             //
             // and that is clearly not correct.
-            let by_value_bindings =
-                parent_bindings
-                    .iter()
-                    .flat_map(|(bindings, _)| bindings)
-                    .chain(&candidate.bindings)
-                    .filter(|binding| {
-                        matches!(binding.binding_mode, BindingMode::ByValue )
-                    });
+            let by_value_bindings = parent_bindings
+                .iter()
+                .flat_map(|(bindings, _)| bindings)
+                .chain(&candidate.bindings)
+                .filter(|binding| matches!(binding.binding_mode, BindingMode::ByValue));
             // Read all of the by reference bindings to ensure that the
             // place they refer to can't be modified by the guard.
             for binding in by_value_bindings.clone() {
diff --git a/compiler/rustc_mir_build/src/build/mod.rs b/compiler/rustc_mir_build/src/build/mod.rs
index 41a8d15b47f..5f6c8d26402 100644
--- a/compiler/rustc_mir_build/src/build/mod.rs
+++ b/compiler/rustc_mir_build/src/build/mod.rs
@@ -76,7 +76,9 @@ fn mir_build(tcx: TyCtxt<'_>, def: ty::WithOptConstParam<LocalDefId>) -> Body<'_
             kind: hir::TraitItemKind::Const(ty, Some(body_id)),
             ..
         }) => (*body_id, ty.span, None),
-        Node::AnonConst(hir::AnonConst { body, hir_id, .. }) => (*body, tcx.hir().span(*hir_id), None),
+        Node::AnonConst(hir::AnonConst { body, hir_id, .. }) => {
+            (*body, tcx.hir().span(*hir_id), None)
+        }
 
         _ => span_bug!(tcx.hir().span(id), "can't build MIR for {:?}", def.did),
     };
@@ -184,7 +186,7 @@ fn mir_build(tcx: TyCtxt<'_>, def: ty::WithOptConstParam<LocalDefId>) -> Body<'_
                 return_ty,
                 return_ty_span,
                 body,
-                span_with_body
+                span_with_body,
             );
             mir.yield_ty = yield_ty;
             mir
@@ -582,7 +584,7 @@ fn construct_fn<'a, 'tcx, A>(
     return_ty: Ty<'tcx>,
     return_ty_span: Span,
     body: &'tcx hir::Body<'tcx>,
-    span_with_body: Span
+    span_with_body: Span,
 ) -> Body<'tcx>
 where
     A: Iterator<Item = ArgInfo<'tcx>>,
@@ -658,7 +660,8 @@ fn construct_const<'a, 'tcx>(
     let owner_id = tcx.hir().body_owner(body_id);
     let def_id = tcx.hir().local_def_id(owner_id);
     let span = tcx.hir().span(owner_id);
-    let mut builder = Builder::new(hir, def_id.to_def_id(), span, 0, Safety::Safe, const_ty, const_ty_span, None);
+    let mut builder =
+        Builder::new(hir, def_id.to_def_id(), span, 0, Safety::Safe, const_ty, const_ty_span, None);
 
     let mut block = START_BLOCK;
     let ast_expr = &tcx.hir().body(body_id).value;
@@ -698,7 +701,8 @@ fn construct_error<'a, 'tcx>(hir: Cx<'a, 'tcx>, body_id: hir::BodyId) -> Body<'t
         hir::BodyOwnerKind::Const => 0,
         hir::BodyOwnerKind::Static(_) => 0,
     };
-    let mut builder = Builder::new(hir, def_id.to_def_id(), span, num_params, Safety::Safe, ty, span, None);
+    let mut builder =
+        Builder::new(hir, def_id.to_def_id(), span, num_params, Safety::Safe, ty, span, None);
     let source_info = builder.source_info(span);
     // Some MIR passes will expect the number of parameters to match the
     // function declaration.
diff --git a/compiler/rustc_mir_build/src/build/scope.rs b/compiler/rustc_mir_build/src/build/scope.rs
index 03717183707..5e9d780d179 100644
--- a/compiler/rustc_mir_build/src/build/scope.rs
+++ b/compiler/rustc_mir_build/src/build/scope.rs
@@ -458,7 +458,9 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         let breakable_scope = self.scopes.breakable_scopes.pop().unwrap();
         assert!(breakable_scope.region_scope == region_scope);
         let break_block = self.build_exit_tree(breakable_scope.break_drops, None);
-        if let Some(drops) = breakable_scope.continue_drops { self.build_exit_tree(drops, loop_block); }
+        if let Some(drops) = breakable_scope.continue_drops {
+            self.build_exit_tree(drops, loop_block);
+        }
         match (normal_exit_block, break_block) {
             (Some(block), None) | (None, Some(block)) => block,
             (None, None) => self.cfg.start_new_block().unit(),
@@ -1364,7 +1366,7 @@ impl<'tcx> DropTreeBuilder<'tcx> for Unwind {
             | TerminatorKind::Yield { .. }
             | TerminatorKind::GeneratorDrop
             | TerminatorKind::FalseEdge { .. }
-            | TerminatorKind::InlineAsm {.. } => {
+            | TerminatorKind::InlineAsm { .. } => {
                 span_bug!(term.source_info.span, "cannot unwind from {:?}", term.kind)
             }
         }