error: useless use of `format!` --> $DIR/format.rs:12:5 | 12 | format!("foo"); | ^^^^^^^^^^^^^^^ help: consider using .to_string(): `"foo".to_string()` | = note: `-D clippy::useless-format` implied by `-D warnings` error: useless use of `format!` --> $DIR/format.rs:14:5 | 14 | format!("{}", "foo"); | ^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"foo".to_string()` | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: useless use of `format!` --> $DIR/format.rs:17:5 | 17 | format!("{:+}", "foo"); // warn when the format makes no difference | ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"foo".to_string()` | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: useless use of `format!` --> $DIR/format.rs:18:5 | 18 | format!("{:<}", "foo"); // warn when the format makes no difference | ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"foo".to_string()` | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: useless use of `format!` --> $DIR/format.rs:23:5 | 23 | format!("{}", arg); | ^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `arg.to_string()` | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: useless use of `format!` --> $DIR/format.rs:26:5 | 26 | format!("{:+}", arg); // warn when the format makes no difference | ^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `arg.to_string()` | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: useless use of `format!` --> $DIR/format.rs:27:5 | 27 | format!("{:<}", arg); // warn when the format makes no difference | ^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `arg.to_string()` | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: aborting due to 7 previous errors