chore: use variables in Rust format strings

Change this:

    format!("{}", foo)

into this:

    format!("{foo}")

Support for this feature was added in Rust 1.58 (see
https://github.com/rust-lang/rust/releases/tag/1.58.0) and in 1.67
clippy suggests about this. Because the new style seems to be where
the Rust ecosystem is going, I think Subplot should follow to avoid
being needlessly different from most other projects.

Sponsored-by: author

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bin/subplot.rs b/src/bin/subplot.rs
index b86c613..7f51b5c 100644
--- a/src/bin/subplot.rs
+++ b/src/bin/subplot.rs
@@ -88,7 +88,7 @@ fn long_version() -> Result<String> {
     writeln!(ret, "{}", render_testament!(VERSION))?;
     writeln!(ret, "Crate version: {}", env!("CARGO_PKG_VERSION"))?;
     if let Some(branch) = VERSION.branch_name {
-        writeln!(ret, "Built from branch: {}", branch)?;
+        writeln!(ret, "Built from branch: {branch}")?;
     } else {
         writeln!(ret, "Branch information is missing.")?;
     }