Add test sugg-field-in-format-string-issue-141136

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>

Author: xizheyin

tests/ui/resolve/suggestions/sugg-field-in-format-string-issue-141136.rs

@@ -0,0 +1,14 @@
+struct Foo {
+    x: i32
+}
+
+impl Foo {
+    fn foo(&self) {
+        let _ = format!("{x}"); //~ ERROR cannot find value `x` in this scope [E0425]
+        let _ = format!("{x }"); //~ ERROR cannot find value `x` in this scope [E0425]
+        let _ = format!("{ x}"); //~ ERROR invalid format string: expected `}`, found `x`
+        let _ = format!("{}", x); //~ ERROR cannot find value `x` in this scope [E0425]
+    }
+}
+
+fn main(){}

tests/ui/resolve/suggestions/sugg-field-in-format-string-issue-141136.stderr

@@ -0,0 +1,46 @@
+error: invalid format string: expected `}`, found `x`
+  --> $DIR/sugg-field-in-format-string-issue-141136.rs:9:28
+   |
+LL |         let _ = format!("{ x}");
+   |                          - ^ expected `}` in format string
+   |                          |
+   |                          because of this opening brace
+   |
+   = note: if you intended to print `{`, you can escape it using `{{`
+
+error[E0425]: cannot find value `x` in this scope
+  --> $DIR/sugg-field-in-format-string-issue-141136.rs:7:27
+   |
+LL |         let _ = format!("{x}");
+   |                           ^
+   |
+help: you might have meant to use the available field
+   |
+LL |         let _ = format!("{self.x}");
+   |                           +++++
+
+error[E0425]: cannot find value `x` in this scope
+  --> $DIR/sugg-field-in-format-string-issue-141136.rs:8:27
+   |
+LL |         let _ = format!("{x }");
+   |                           ^^
+   |
+help: you might have meant to use the available field
+   |
+LL |         let _ = format!("{self.x }");
+   |                           +++++
+
+error[E0425]: cannot find value `x` in this scope
+  --> $DIR/sugg-field-in-format-string-issue-141136.rs:10:31
+   |
+LL |         let _ = format!("{}", x);
+   |                               ^
+   |
+help: you might have meant to use the available field
+   |
+LL |         let _ = format!("{}", self.x);
+   |                               +++++
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0425`.