Add two format_args test cases

Author: smoelius

tests/ui/format_args.fixed

@@ -6,14 +6,24 @@
 use std::io::{Error, ErrorKind};
 use std::panic::Location;
 
+struct Somewhere;
+
+impl ToString for Somewhere {
+    fn to_string(&self) -> String {
+        String::from("somewhere")
+    }
+}
+
 fn main() {
     let error = Error::new(ErrorKind::Other, "bad thing");
     println!("error: something failed at {}", Location::caller());
     println!("{}: something failed at {}", error, Location::caller());
     println!("{:?}: something failed at {}", error, Location::caller());
+    println!("{{}}: something failed at {}", Location::caller());
     println!(r#"error: "something failed at {}""#, Location::caller());
     println!("error: {}", format_args!("something failed at {}", Location::caller()));
     println!("error: {:>70}", format!("something failed at {}", Location::caller()));
     let _ = format!("error: something failed at {}", Location::caller());
     println!("error: something failed at {}", Location::caller());
+    println!("error: something failed at {}", Somewhere.to_string());
 }

tests/ui/format_args.rs

@@ -6,14 +6,24 @@
 use std::io::{Error, ErrorKind};
 use std::panic::Location;
 
+struct Somewhere;
+
+impl ToString for Somewhere {
+    fn to_string(&self) -> String {
+        String::from("somewhere")
+    }
+}
+
 fn main() {
     let error = Error::new(ErrorKind::Other, "bad thing");
     println!("error: {}", format!("something failed at {}", Location::caller()));
     println!("{}: {}", error, format!("something failed at {}", Location::caller()));
     println!("{:?}: {}", error, format!("something failed at {}", Location::caller()));
+    println!("{{}}: {}", format!("something failed at {}", Location::caller()));
     println!(r#"error: "{}""#, format!("something failed at {}", Location::caller()));
     println!("error: {}", format_args!("something failed at {}", Location::caller()));
     println!("error: {:>70}", format!("something failed at {}", Location::caller()));
     let _ = format!("error: {}", format!("something failed at {}", Location::caller()));
     println!("error: something failed at {}", Location::caller().to_string());
+    println!("error: something failed at {}", Somewhere.to_string());
 }

tests/ui/format_args.stderr

@@ -1,42 +1,48 @@
 error: `format!` in `println!` args
-  --> $DIR/format_args.rs:11:5
+  --> $DIR/format_args.rs:19:5
    |
 LL |     println!("error: {}", format!("something failed at {}", Location::caller()));
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: inline the `format!` call: `println!("error: something failed at {}", Location::caller())`
    |
    = note: `-D clippy::format-in-format-args` implied by `-D warnings`
 
 error: `format!` in `println!` args
-  --> $DIR/format_args.rs:12:5
+  --> $DIR/format_args.rs:20:5
    |
 LL |     println!("{}: {}", error, format!("something failed at {}", Location::caller()));
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: inline the `format!` call: `println!("{}: something failed at {}", error, Location::caller())`
 
 error: `format!` in `println!` args
-  --> $DIR/format_args.rs:13:5
+  --> $DIR/format_args.rs:21:5
    |
 LL |     println!("{:?}: {}", error, format!("something failed at {}", Location::caller()));
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: inline the `format!` call: `println!("{:?}: something failed at {}", error, Location::caller())`
 
 error: `format!` in `println!` args
-  --> $DIR/format_args.rs:14:5
+  --> $DIR/format_args.rs:22:5
+   |
+LL |     println!("{{}}: {}", format!("something failed at {}", Location::caller()));
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: inline the `format!` call: `println!("{{}}: something failed at {}", Location::caller())`
+
+error: `format!` in `println!` args
+  --> $DIR/format_args.rs:23:5
    |
 LL |     println!(r#"error: "{}""#, format!("something failed at {}", Location::caller()));
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: inline the `format!` call: `println!(r#"error: "something failed at {}""#, Location::caller())`
 
 error: `format!` in `format!` args
-  --> $DIR/format_args.rs:17:13
+  --> $DIR/format_args.rs:26:13
    |
 LL |     let _ = format!("error: {}", format!("something failed at {}", Location::caller()));
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: inline the `format!` call: `format!("error: something failed at {}", Location::caller())`
 
 error: `to_string` applied to a type that implements `Display` in `println!` args
-  --> $DIR/format_args.rs:18:65
+  --> $DIR/format_args.rs:27:65
    |
 LL |     println!("error: something failed at {}", Location::caller().to_string());
    |                                                                 ^^^^^^^^^^^^ help: remove this
    |
    = note: `-D clippy::to-string-in-format-args` implied by `-D warnings`
 
-error: aborting due to 6 previous errors
+error: aborting due to 7 previous errors