fix: Clean up awkward user-facing tune/config output lines

crates/launchbound-cli/src/main.rs

@@ -420,7 +420,7 @@ fn cmd_tune(
             )?;
             let dev = device(cc)?;
             println!(
-                "{} — ESTIMATED tuning (analytical model, cc {cc}); the gate is full,                  the timings are NOT measurements:",
+                "{} — ESTIMATED tuning (analytical model, cc {cc}); the gate is full, the timings are NOT measurements:",
                 spec.name
             );
             let mut admitted: Vec<_> = verdicts

crates/launchbound-tui/src/app.rs

@@ -108,6 +108,22 @@ fn draw_header(frame: &mut Frame<'_>, app: &App, area: Rect) {
     frame.render_widget(Paragraph::new(lines), area);
 }
 
+/// The banner above the field when refused configurations measured faster.
+///
+/// A function rather than an inline `format!` so both arities can be tested.
+/// The count comes from measured timings, and the one fixture the golden
+/// frames are built on yields exactly one — so the plural branch is not
+/// reachable from a rendered frame without rebuilding that fixture, which
+/// would move every golden in the suite to cover two words.
+fn refused_faster_banner(count: usize) -> String {
+    let noun = if count == 1 {
+        "configuration"
+    } else {
+        "configurations"
+    };
+    format!("{count} REFUSED {noun} measured FASTER than the chosen one — view 3")
+}
+
 fn draw_overview(frame: &mut Frame<'_>, app: &App, area: Rect) {
     let r = &app.report;
     let mut lines = Vec::new();
@@ -133,10 +149,7 @@ fn draw_overview(frame: &mut Frame<'_>, app: &App, area: Rect) {
     if !r.rejected_faster.is_empty() {
         lines.push(Line::from(""));
         lines.push(Line::from(Span::styled(
-            format!(
-                "{} REFUSED configuration(s) measured FASTER than the chosen one — view 3",
-                r.rejected_faster.len()
-            ),
+            refused_faster_banner(r.rejected_faster.len()),
             Style::default().add_modifier(Modifier::BOLD),
         )));
     }
@@ -363,3 +376,23 @@ fn bar(done: usize, total: usize, width: usize) -> String {
     }
     s
 }
+
+#[cfg(test)]
+mod tests {
+    use super::refused_faster_banner;
+
+    #[test]
+    fn the_refused_faster_banner_agrees_with_its_own_count() {
+        assert_eq!(
+            refused_faster_banner(1),
+            "1 REFUSED configuration measured FASTER than the chosen one — view 3"
+        );
+        assert_eq!(
+            refused_faster_banner(2),
+            "2 REFUSED configurations measured FASTER than the chosen one — view 3"
+        );
+        // Not reachable through the view — the banner is drawn only when the
+        // list is non-empty — but the function is total, so it is pinned.
+        assert!(refused_faster_banner(0).starts_with("0 REFUSED configurations"));
+    }
+}

crates/launchbound-tui/tests/golden/overview-110x32.txt

@@ -4,7 +4,7 @@ launchbound — reduce-flip · gate cc 8.6 · measured · NVIDIA A10G
 ┌overview────────────────────────────────────────────────────────────────────────────────────────────────────┐
 │CHOSEN  c1-0000000000000009  block_x=32 tile=512 unroll=4  0.0400 ms [0.0398, 0.0402]                       │
 │                                                                                                            │
-│1 REFUSED configuration(s) measured FASTER than the chosen one — view 3                                     │
+│1 REFUSED configuration measured FASTER than the chosen one — view 3                                        │
 │                                                                                                            │
 │GPU-seconds consumed: 25.5                                                                                  │
 │                                                                                                            │

crates/launchbound-tui/tests/golden/overview-80x24.txt

@@ -4,7 +4,7 @@ launchbound — reduce-flip · gate cc 8.6 · measured · NVIDIA A10G
 ┌overview──────────────────────────────────────────────────────────────────────┐
 │CHOSEN  c1-0000000000000009  block_x=32 tile=512 unroll=4  0.0400 ms [0.0398, │
 │                                                                              │
-│1 REFUSED configuration(s) measured FASTER than the chosen one — view 3       │
+│1 REFUSED configuration measured FASTER than the chosen one — view 3          │
 │                                                                              │
 │GPU-seconds consumed: 25.5                                                    │
 │                                                                              │