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, 2 insertions, 4 deletions

diff --git a/examples/seq/seq-extras.rs b/examples/seq/seq-extras.rs
index 79863fc..b2185fb 100644
--- a/examples/seq/seq-extras.rs
+++ b/examples/seq/seq-extras.rs
@@ -26,8 +26,7 @@ fn count_lines_in_stdout(context: &Runcmd, count: usize) {
         // step error.  This will be reported as the reason the
         // scenario fails.
         throw!(format!(
-            "Incorrect number of lines, got {} expected {}",
-            stdout_count, count
+            "Incorrect number of lines, got {stdout_count} expected {count}",
         ));
     }
 }
@@ -57,8 +56,7 @@ fn stderr_contains_two_things(context: &ScenarioContext, what: &str, other: &str
 
     if !stderr_has_both {
         throw!(format!(
-            "Stderr does not contain both of {:?} and {:?}",
-            what, other
+            "Stderr does not contain both of {what:?} and {other:?}",
         ))
     }
 }