# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 2021-03-01 22:44:29
# Node ID f2fc34e882388423f1bfca0a9a1ce87e1080d0e3
# Parent  dde86beca38896bae0cdee3393cb1c33dbdc7add

copies-rust: remove an unnecessary format!() inside assert!()

The `assert!()` macro supports formatting. Rust 2021 no longer
supports an unnecessary `format!()` inside it. I noticed because I
recently update my Rust toolchain and `test-check-cargo-lock.t`
started failing.

Differential Revision: https://phab.mercurial-scm.org/D10085

diff --git a/rust/hg-core/src/copy_tracing.rs b/rust/hg-core/src/copy_tracing.rs
--- a/rust/hg-core/src/copy_tracing.rs
+++ b/rust/hg-core/src/copy_tracing.rs
@@ -357,7 +357,7 @@ impl TwoWayPathMap {
     }
 
     fn untokenize(&self, token: PathToken) -> &HgPathBuf {
-        assert!(token < self.path.len(), format!("Unknown token: {}", token));
+        assert!(token < self.path.len(), "Unknown token: {}", token);
         &self.path[token]
     }
 }