diff --git a/src/librustc_mir/util/pretty.rs b/src/librustc_mir/util/pretty.rs
index f8dfddef2bb..4c380d11418 100644
--- a/src/librustc_mir/util/pretty.rs
+++ b/src/librustc_mir/util/pretty.rs
@@ -561,7 +561,7 @@ fn write_mir_sig(
 
     ty::print::with_forced_impl_filename_line(|| {
         // see notes on #41697 elsewhere
-        write!(w, " {}", tcx.def_path_str(src.def_id()))
+        write!(w, "{}", tcx.def_path_str(src.def_id()))
     })?;
 
     if src.promoted.is_none() && is_function {
diff --git a/src/test/mir-opt/retag.rs b/src/test/mir-opt/retag.rs
index e917441200b..a0a7a760c2d 100644
--- a/src/test/mir-opt/retag.rs
+++ b/src/test/mir-opt/retag.rs
@@ -121,7 +121,7 @@ fn main() {
 // }
 // END rustc.main-{{closure}}.SimplifyCfg-elaborate-drops.after.mir
 // START rustc.ptr-drop_in_place.Test.SimplifyCfg-make_shim.after.mir
-// fn  std::intrinsics::drop_in_place(_1: *mut Test) -> () {
+// fn std::intrinsics::drop_in_place(_1: *mut Test) -> () {
 //     ...
 //     bb0: {
 //         Retag([raw] _1);