Fix overflow in error emitter

tests/ui/suggestions/issue-109854.rs

@@ -0,0 +1,12 @@
+fn generate_setter() {
+    String::with_capacity(
+    //~^ ERROR this function takes 1 argument but 3 arguments were supplied
+    generate_setter,
+    r#"
+pub(crate) struct Person<T: Clone> {}
+"#,
+     r#""#,
+    );
+}
+
+fn main() {}

tests/ui/suggestions/issue-109854.stderr

@@ -0,0 +1,31 @@
+error[E0061]: this function takes 1 argument but 3 arguments were supplied
+  --> $DIR/issue-109854.rs:2:5
+   |
+LL |       String::with_capacity(
+   |       ^^^^^^^^^^^^^^^^^^^^^
+...
+LL | /     r#"
+LL | | pub(crate) struct Person<T: Clone> {}
+LL | | "#,
+   | |__- unexpected argument of type `&'static str`
+LL |        r#""#,
+   |        ----- unexpected argument of type `&'static str`
+   |
+note: expected `usize`, found fn item
+  --> $DIR/issue-109854.rs:4:5
+   |
+LL |     generate_setter,
+   |     ^^^^^^^^^^^^^^^
+   = note: expected type `usize`
+           found fn item `fn() {generate_setter}`
+note: associated function defined here
+  --> $SRC_DIR/alloc/src/string.rs:LL:COL
+help: remove the extra arguments
+   |
+LL -     generate_setter,
+LL +     /* usize */,
+   |
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0061`.

tests/ui/suggestions/issue-94171.rs

@@ -0,0 +1,5 @@
+fn L(]{match
+(; {`
+//~^^ ERROR mismatched closing delimiter
+//~^^ ERROR unknown start of token
+//~ ERROR this file contains an unclosed delimiter

tests/ui/suggestions/issue-94171.stderr

@@ -0,0 +1,36 @@
+error: unknown start of token: `
+  --> $DIR/issue-94171.rs:2:5
+   |
+LL | (; {`
+   |     ^
+   |
+help: Unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it is not
+   |
+LL | (; {'
+   |     ~
+
+error: mismatched closing delimiter: `]`
+  --> $DIR/issue-94171.rs:1:5
+   |
+LL | fn L(]{match
+   |     ^^ mismatched closing delimiter
+   |     |
+   |     unclosed delimiter
+
+error: this file contains an unclosed delimiter
+  --> $DIR/issue-94171.rs:5:52
+   |
+LL | fn L(]{match
+   |      -- unclosed delimiter
+   |      |
+   |      missing open `[` for this delimiter
+LL | (; {`
+   | -  - unclosed delimiter
+   | |
+   | unclosed delimiter
+...
+LL |
+   |                                                    ^
+
+error: aborting due to 3 previous errors
+