add regression test

src/test/ui/argument-suggestions/issue-97484.rs

@@ -0,0 +1,14 @@
+struct A;
+struct B;
+struct C;
+struct D;
+struct E;
+struct F;
+struct G;
+
+fn foo(a: &A, d: D, e: &E, g: G) {}
+
+fn main() {
+    foo(&&A, B, C, D, E, F, G);
+    //~^ ERROR this function takes 4 arguments but 7 arguments were supplied
+}

src/test/ui/argument-suggestions/issue-97484.stderr

@@ -0,0 +1,27 @@
+error[E0061]: this function takes 4 arguments but 7 arguments were supplied
+  --> $DIR/issue-97484.rs:12:5
+   |
+LL |     foo(&&A, B, C, D, E, F, G);
+   |     ^^^      -  -        - argument unexpected
+   |              |  |
+   |              |  argument of type `&E` unexpected
+   |              argument of type `D` unexpected
+   |
+note: function defined here
+  --> $DIR/issue-97484.rs:9:4
+   |
+LL | fn foo(a: &A, d: D, e: &E, g: G) {}
+   |    ^^^ -----  ----  -----  ----
+help: consider removing the ``
+   |
+LL -     foo(&&A, B, C, D, E, F, G);
+LL +     foo(&&A, B, C, D, E, F, G);
+   | 
+help: remove the extra arguments
+   |
+LL |     foo(&&A, D, {&E}, G);
+   |     ~~~~~~~~~~~~~~~~~~~~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0061`.