cleanup

Author: chenyukang

compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs

@@ -1341,7 +1341,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, '_, 'infcx, 'tcx> {
                     };
                     err.span_suggestion_verbose(
                         span,
-                        format!("consider {changing} this binding's type xxx"),
+                        format!("consider {changing} this binding's type"),
                         sugg,
                         Applicability::HasPlaceholders,
                     );
@@ -1455,11 +1455,6 @@ fn suggest_ampmut<'tcx>(
     // let x: &i32 = &'a 5;
     //                ^^ lifetime annotation not allowed
     //
-    eprintln!("opt_assignment_rhs_span: {:?}", opt_assignment_rhs_span);
-    eprintln!(
-        "code result: {:?}",
-        tcx.sess.source_map().span_to_snippet(opt_assignment_rhs_span.unwrap())
-    );
     if let Some(assignment_rhs_span) = opt_assignment_rhs_span
         && let Ok(src) = tcx.sess.source_map().span_to_snippet(assignment_rhs_span)
         && let Some(stripped) = src.strip_prefix('&')