Add some additional double-adjustment regression tests

src/test/ui/argument-suggestions/issue-98894.rs

@@ -0,0 +1,4 @@
+fn main() {
+    (|_, ()| ())(if true {} else {return;});
+    //~^ ERROR this function takes 2 arguments but 1 argument was supplied
+}

src/test/ui/argument-suggestions/issue-98894.stderr

@@ -0,0 +1,19 @@
+error[E0057]: this function takes 2 arguments but 1 argument was supplied
+  --> $DIR/issue-98894.rs:2:5
+   |
+LL |     (|_, ()| ())(if true {} else {return;});
+   |     ^^^^^^^^^^^^--------------------------- an argument of type `()` is missing
+   |
+note: closure defined here
+  --> $DIR/issue-98894.rs:2:6
+   |
+LL |     (|_, ()| ())(if true {} else {return;});
+   |      ^^^^^^^
+help: provide the argument
+   |
+LL |     (|_, ()| ())(if true {} else {return;}, ());
+   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0057`.

src/test/ui/argument-suggestions/issue-98897.rs

@@ -0,0 +1,4 @@
+fn main() {
+    (|_, ()| ())([return, ()]);
+    //~^ ERROR this function takes 2 arguments but 1 argument was supplied
+}

src/test/ui/argument-suggestions/issue-98897.stderr

@@ -0,0 +1,19 @@
+error[E0057]: this function takes 2 arguments but 1 argument was supplied
+  --> $DIR/issue-98897.rs:2:5
+   |
+LL |     (|_, ()| ())([return, ()]);
+   |     ^^^^^^^^^^^^-------------- an argument of type `()` is missing
+   |
+note: closure defined here
+  --> $DIR/issue-98897.rs:2:6
+   |
+LL |     (|_, ()| ())([return, ()]);
+   |      ^^^^^^^
+help: provide the argument
+   |
+LL |     (|_, ()| ())([return, ()], ());
+   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0057`.