style: fix clippy and deprecation warnings in test and bench targets

cli/tests/shell_completions_integration.rs

@@ -1012,14 +1012,12 @@ cmd other help="Another subcommand"
     let lines: Vec<&str> = output.lines().collect();
 
     assert!(
-        lines.iter().any(|l| *l == "sub\tA subcommand\tsub"),
+        lines.contains(&"sub\tA subcommand\tsub"),
         "Expected 'sub\\tA subcommand\\tsub' in zsh output, got: {:?}",
         lines
     );
     assert!(
-        lines
-            .iter()
-            .any(|l| *l == "other\tAnother subcommand\tother"),
+        lines.contains(&"other\tAnother subcommand\tother"),
         "Expected 'other\\tAnother subcommand\\tother' in zsh output, got: {:?}",
         lines
     );

lib/benches/parse.rs

@@ -1,4 +1,5 @@
-use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use criterion::{criterion_group, criterion_main, Criterion};
+use std::hint::black_box;
 use usage::{parse, Spec, SpecArg, SpecCommand, SpecFlag};
 
 fn build_small_spec() -> Spec {

lib/src/parse.rs

@@ -2048,11 +2048,11 @@ mod tests {
         // (d) Negative case: a purely-local flag that shares nothing with a global is NOT
         // promoted/merged — it is correctly dropped when descending into the mount.
         assert!(
-            parsed.available_flags.get("-f").is_none(),
+            !parsed.available_flags.contains_key("-f"),
             "purely-local -f must not be promoted onto a global",
         );
         assert!(
-            parsed.available_flags.get("--force").is_none(),
+            !parsed.available_flags.contains_key("--force"),
             "purely-local --force must not be promoted onto a global",
         );