Improve suggestion wording

Author: WaffleLapkin

compiler/rustc_typeck/src/check/pat.rs

@@ -666,7 +666,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             match binding_parent {
                 hir::Node::Param(hir::Param { ty_span, .. }) if binding.span.hi() <= ty_span.lo() => {
                     err.multipart_suggestion_verbose(
-                        format!("to take parameter by ref, move `&{mutability}` to the type"), 
+                        format!("to take parameter `{binding}` by reference, move `&{mutability}` to the type"), 
                         vec![
                             (pat.span.until(inner.span), "".to_owned()),
                             (ty_span.shrink_to_lo(), format!("&{}", mutbl.prefix_str())),

src/test/ui/mismatched_types/issue-38371.stderr

@@ -8,7 +8,7 @@ LL | fn foo(&_a: Foo) {}
    |
    = note: expected struct `Foo`
            found reference `&_`
-help: to take parameter by ref, move `&` to the type
+help: to take parameter `_a` by reference, move `&` to the type
    |
 LL - fn foo(&_a: Foo) {}
 LL + fn foo(_a: &Foo) {}

src/test/ui/mismatched_types/ref-pat-suggestions.stderr

@@ -8,7 +8,7 @@ LL | fn _f0(&_a: u32) {}
    |
    = note:   expected type `u32`
            found reference `&_`
-help: to take parameter by ref, move `&` to the type
+help: to take parameter `_a` by reference, move `&` to the type
    |
 LL - fn _f0(&_a: u32) {}
 LL + fn _f0(_a: &u32) {}
@@ -24,7 +24,7 @@ LL | fn _f1(&mut _a: u32) {}
    |
    = note:           expected type `u32`
            found mutable reference `&mut _`
-help: to take parameter by ref, move `&mut` to the type
+help: to take parameter `_a` by reference, move `&mut` to the type
    |
 LL - fn _f1(&mut _a: u32) {}
 LL + fn _f1(_a: &mut u32) {}
@@ -206,7 +206,7 @@ LL |     let _ = |&_a: u32| ();
    |
    = note:   expected type `u32`
            found reference `&_`
-help: to take parameter by ref, move `&` to the type
+help: to take parameter `_a` by reference, move `&` to the type
    |
 LL -     let _ = |&_a: u32| ();
 LL +     let _ = |_a: &u32| ();
@@ -222,7 +222,7 @@ LL |     let _ = |&mut _a: u32| ();
    |
    = note:           expected type `u32`
            found mutable reference `&mut _`
-help: to take parameter by ref, move `&mut` to the type
+help: to take parameter `_a` by reference, move `&mut` to the type
    |
 LL -     let _ = |&mut _a: u32| ();
 LL +     let _ = |_a: &mut u32| ();