this derivation will be built:
  /nix/store/87bchlm3mfiay3a0sdpfxkyg4a5smvcx-treefmt-check.drv
building '/nix/store/87bchlm3mfiay3a0sdpfxkyg4a5smvcx-treefmt-check.drv' on 'ssh-ng://customer@mac02'
building '/nix/store/87bchlm3mfiay3a0sdpfxkyg4a5smvcx-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 724 files
treefmt-check> emitted 298 files for processing
treefmt-check> formatted 298 files (3 changed) in 1.03s
treefmt-check>  M crates/tinc-crypto/src/invite.rs
treefmt-check>  M crates/tinc-tools/src/cmd/invite.rs
treefmt-check>  M crates/tinc-tools/src/cmd/join/tests.rs
treefmt-check> diff --git a/crates/tinc-crypto/src/invite.rs b/crates/tinc-crypto/src/invite.rs
treefmt-check> index 39291b9..82c4fd2 100644
treefmt-check> --- a/crates/tinc-crypto/src/invite.rs
treefmt-check> +++ b/crates/tinc-crypto/src/invite.rs
treefmt-check> @@ -214,12 +214,18 @@ mod tests {
treefmt-check>  
treefmt-check>      #[test]
treefmt-check>      fn replace_marker() {
treefmt-check> -        assert_eq!(strip_replace_marker(b"Name = a\n"), (None, &b"Name = a\n"[..]));
treefmt-check> +        assert_eq!(
treefmt-check> +            strip_replace_marker(b"Name = a\n"),
treefmt-check> +            (None, &b"Name = a\n"[..])
treefmt-check> +        );
treefmt-check>          assert_eq!(
treefmt-check>              strip_replace_marker(b"#replace abc\nName = a\n"),
treefmt-check>              (Some(&b"abc"[..]), &b"Name = a\n"[..])
treefmt-check>          );
treefmt-check> -        assert_eq!(strip_replace_marker(b"#replace abc"), (Some(&b"abc"[..]), &b""[..]));
treefmt-check> +        assert_eq!(
treefmt-check> +            strip_replace_marker(b"#replace abc"),
treefmt-check> +            (Some(&b"abc"[..]), &b""[..])
treefmt-check> +        );
treefmt-check>      }
treefmt-check>  
treefmt-check>      /// `key_hash(pk) == fingerprint_hash(fingerprint(pk))`. The KAT
treefmt-check> diff --git a/crates/tinc-tools/src/cmd/invite.rs b/crates/tinc-tools/src/cmd/invite.rs
treefmt-check> index 140036a..44153e9 100644
treefmt-check> --- a/crates/tinc-tools/src/cmd/invite.rs
treefmt-check> +++ b/crates/tinc-tools/src/cmd/invite.rs
treefmt-check> @@ -54,8 +54,8 @@ use std::time::{Duration, SystemTime};
treefmt-check>  
treefmt-check>  use rand_core::Rng;
treefmt-check>  use tinc_conf::Config;
treefmt-check> -use tinc_crypto::invite::{COOKIE_LEN, REPLACE_MARKER, SLUG_PART_LEN, build_slug, cookie_filename};
treefmt-check>  use tinc_crypto::b64;
treefmt-check> +use tinc_crypto::invite::{COOKIE_LEN, REPLACE_MARKER, SLUG_PART_LEN, build_slug, cookie_filename};
treefmt-check>  use tinc_crypto::os_rng;
treefmt-check>  use tinc_crypto::sign::SigningKey;
treefmt-check>  use zeroize::Zeroizing;
treefmt-check> @@ -139,7 +139,10 @@ pub fn invite(
treefmt-check>          let file = hosts.file(invitee);
treefmt-check>          let cfg = Config::read(&file).map_err(|e| CmdError::BadInput(e.to_string()))?;
treefmt-check>          let key = keypair::load_public_from_config(&cfg, &file).ok_or_else(|| {
treefmt-check> -            CmdError::BadInput(format!("{} has no Ed25519 public key to replace", file.display()))
treefmt-check> +            CmdError::BadInput(format!(
treefmt-check> +                "{} has no Ed25519 public key to replace",
treefmt-check> +                file.display()
treefmt-check> +            ))
treefmt-check>          })?;
treefmt-check>          Some(b64::encode(&key))
treefmt-check>      } else {
treefmt-check> @@ -981,10 +984,17 @@ mod tests {
treefmt-check>          let paths = cd.paths().clone();
treefmt-check>          init_with_address(&paths, "alice", "myhost");
treefmt-check>          let old = b64::encode(&[7u8; 32]);
treefmt-check> -        let cd = cd.with_overlay_host("bob", &format!("Subnet = 10.0.0.7\nEd25519PublicKey = {old}\n"));
treefmt-check> +        let cd = cd.with_overlay_host(
treefmt-check> +            "bob",
treefmt-check> +            &format!("Subnet = 10.0.0.7\nEd25519PublicKey = {old}\n"),
treefmt-check> +        );
treefmt-check>          let paths = cd.paths().clone();
treefmt-check>          let script = cd.confbase().join("invitation-created");
treefmt-check> -        fs::write(&script, "#!/bin/sh\necho \"# $REPLACE\" >> \"$INVITATION_FILE\"\n").unwrap();
treefmt-check> +        fs::write(
treefmt-check> +            &script,
treefmt-check> +            "#!/bin/sh\necho \"# $REPLACE\" >> \"$INVITATION_FILE\"\n",
treefmt-check> +        )
treefmt-check> +        .unwrap();
treefmt-check>          fs::set_permissions(&script, fs::Permissions::from_mode(0o755)).unwrap();
treefmt-check>  
treefmt-check>          invite(&paths, None, "bob", true, SystemTime::now()).unwrap();
treefmt-check> @@ -1010,7 +1020,10 @@ mod tests {
treefmt-check>              ("rsa", "no Ed25519 public key"),
treefmt-check>          ] {
treefmt-check>              let err = invite(&paths, None, who, true, SystemTime::now()).unwrap_err();
treefmt-check> -            assert!(matches!(&err, CmdError::BadInput(m) if m.contains(want)), "{who}: {err}");
treefmt-check> +            assert!(
treefmt-check> +                matches!(&err, CmdError::BadInput(m) if m.contains(want)),
treefmt-check> +                "{who}: {err}"
treefmt-check> +            );
treefmt-check>          }
treefmt-check>      }
treefmt-check>  
treefmt-check> diff --git a/crates/tinc-tools/src/cmd/join/tests.rs b/crates/tinc-tools/src/cmd/join/tests.rs
treefmt-check> index 03087db..084f6f0 100644
treefmt-check> --- a/crates/tinc-tools/src/cmd/join/tests.rs
treefmt-check> +++ b/crates/tinc-tools/src/cmd/join/tests.rs
treefmt-check> @@ -496,7 +496,8 @@ fn invite_join_roundtrip_in_process() {
treefmt-check>          .append_conf("Mode = switch\n");
treefmt-check>      let inviter = inviter_cd.paths();
treefmt-check>  
treefmt-check> -    let inv_result = invite::invite(inviter, Some("acme"), "bob", false, SystemTime::now()).unwrap();
treefmt-check> +    let inv_result =
treefmt-check> +        invite::invite(inviter, Some("acme"), "bob", false, SystemTime::now()).unwrap();
treefmt-check>      let parsed = parse_url(&inv_result.url).unwrap();
treefmt-check>  
treefmt-check>      // Load invitation key. Both the server stub and the joiner's
error: build of '/nix/store/87bchlm3mfiay3a0sdpfxkyg4a5smvcx-treefmt-check.drv' on 'ssh-ng://customer@mac02' failed: Cannot build '/nix/store/87bchlm3mfiay3a0sdpfxkyg4a5smvcx-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6wgz1j9jh7k3qf7qkknw8x6g4gcj798c-treefmt-check
       Last 25 log lines:
       >              ("rsa", "no Ed25519 public key"),
       >          ] {
       >              let err = invite(&paths, None, who, true, SystemTime::now()).unwrap_err();
       > -            assert!(matches!(&err, CmdError::BadInput(m) if m.contains(want)), "{who}: {err}");
       > +            assert!(
       > +                matches!(&err, CmdError::BadInput(m) if m.contains(want)),
       > +                "{who}: {err}"
       > +            );
       >          }
       >      }
       >  
       > diff --git a/crates/tinc-tools/src/cmd/join/tests.rs b/crates/tinc-tools/src/cmd/join/tests.rs
       > index 03087db..084f6f0 100644
       > --- a/crates/tinc-tools/src/cmd/join/tests.rs
       > +++ b/crates/tinc-tools/src/cmd/join/tests.rs
       > @@ -496,7 +496,8 @@ fn invite_join_roundtrip_in_process() {
       >          .append_conf("Mode = switch\n");
       >      let inviter = inviter_cd.paths();
       >  
       > -    let inv_result = invite::invite(inviter, Some("acme"), "bob", false, SystemTime::now()).unwrap();
       > +    let inv_result =
       > +        invite::invite(inviter, Some("acme"), "bob", false, SystemTime::now()).unwrap();
       >      let parsed = parse_url(&inv_result.url).unwrap();
       >  
       >      // Load invitation key. Both the server stub and the joiner's
       For full logs, run:
         nix log /nix/store/87bchlm3mfiay3a0sdpfxkyg4a5smvcx-treefmt-check.drv
error: Cannot build '/nix/store/87bchlm3mfiay3a0sdpfxkyg4a5smvcx-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6wgz1j9jh7k3qf7qkknw8x6g4gcj798c-treefmt-check