[tx2-web] Fix some new clippy warnings (following rustup update).

Author: youngman-g

tx2-web/rust/src/io.rs

@@ -211,7 +211,7 @@ pub fn get_builtin_sample_tape(sample_name: &str) -> Result<Vec<u8>, String> {
     match sample_name {
         "echo" => Ok(sample_binary_echo()),
         "hello" => Ok(sample_binary_hello()),
-        _ => Err(format!("unknown sample file '{}'", sample_name)),
+        _ => Err(format!("unknown sample file '{sample_name}'")),
     }
     .map(|data| data.to_vec())
 }
@@ -258,7 +258,7 @@ pub fn tx2_device_statuses(
     let context = make_context(simulated_system_time_secs, elapsed_time_secs);
     match tx2.sequence_statuses(&context) {
         Err(e) => {
-            panic!("tx2_device_statuses: failed: {}", e);
+            panic!("tx2_device_statuses: failed: {e}");
         }
         Ok(statuses) => statuses
             .into_iter()

tx2-web/rust/src/io/keyboard.rs

@@ -304,8 +304,7 @@ fn hit_detection_colour_does_not_map_to_a_key_code() {
         return;
     }
     panic!(
-        "Colour {} should map to 'no key' (that is, {:?}) but it actually mapped to {:?}",
-        HIT_DETECTION_BACKGROUND, expected, got
+        "Colour {HIT_DETECTION_BACKGROUND} should map to 'no key' (that is, {expected:?}) but it actually mapped to {got:?}",
     );
 }
 
@@ -1922,8 +1921,7 @@ fn codes_used_in_both_near_and_far_keyboards() {
         let expected_count: usize = if once_keys.contains(code) { 1 } else { 2 };
         if *actual_count != expected_count {
             panic!(
-                "expected to see code code {:o} with frequency of {} but got frequency of {}",
-                code, expected_count, actual_count
+                "expected to see code code {code:o} with frequency of {expected_count} but got frequency of {actual_count}",
             );
         }
     }
@@ -1947,7 +1945,7 @@ fn all_input_codes_used() {
             }
             n => {
                 if !key_code_counts.contains_key(&n) {
-                    panic!("No key generates code {:o}", n);
+                    panic!("No key generates code {n:o}");
                 }
             }
         }

tx2-web/rust/src/lib.rs

@@ -125,7 +125,7 @@ pub fn tx2_codabo(tx2: &mut Tx2, simulated_time: f64, elapsed_time_secs: f64) {
     event!(Level::INFO, "codabo");
     let context = make_context(simulated_time, elapsed_time_secs);
     if let Err(e) = tx2.codabo(&context, &ResetMode::ResetTSP) {
-        panic!("codabo failed: {}", e);
+        panic!("codabo failed: {e}");
     }
     tx2.set_next_execution_due(context.simulated_time, Some(context.simulated_time));
     tx2.set_run_mode(RunMode::Running);

tx2-web/rust/src/lw.rs

@@ -26,7 +26,7 @@ pub(crate) fn display_lw_unit_output_event(unit: Unsigned6Bit, ch: DescribedChar
         Level::INFO,
         "display_lw_unit_output_event: handling output event for LW unit {unit:?}"
     );
-    let current_line_element_id = format!("lw{:o}-current-line", unit);
+    let current_line_element_id = format!("lw{unit:o}-current-line");
     let current_line_el = doc
         .get_element_by_id(&current_line_element_id)
         .expect("LW current line element is missing from HTML document");
@@ -37,7 +37,7 @@ pub(crate) fn display_lw_unit_output_event(unit: Unsigned6Bit, ch: DescribedChar
             ..
         } => {
             event!(Level::INFO, "LW: processing a carriage return");
-            let history_element_id = format!("lw{:o}-history", unit);
+            let history_element_id = format!("lw{unit:o}-history");
             let history_el = doc
                 .get_element_by_id(&history_element_id)
                 .expect("LW history element is missing from HTML document");