new: give wizard select labels their own separator

src/new/questions.rs

@@ -51,6 +51,26 @@ pub const KNOWN_LICENSES: [&str; 9] = [
     "ISC",
 ];
 
+/// Labels of the interactive `select` questions. `prompt::select` renders
+/// `> <label><answer>` verbatim — unlike [`prompt::text`], it appends no
+/// formatting of its own — so each label carries its own separator:
+/// field-style prompts end with `": "`, question-style ones with `"? "`.
+const LANGUAGE_LABEL: &str = "Which language/build system is your program using? ";
+const SOURCE_LABEL: &str = "Where is the source code? ";
+const LICENSE_LABEL: &str = "License: ";
+const DIST_LABEL: &str = "Target distribution: ";
+const SERIES_LABEL: &str = "Target series: ";
+
+/// All select labels, so the separator test can check them in one place.
+#[cfg(test)]
+const SELECT_LABELS: [&str; 5] = [
+    LANGUAGE_LABEL,
+    SOURCE_LABEL,
+    LICENSE_LABEL,
+    DIST_LABEL,
+    SERIES_LABEL,
+];
+
 /// Run the `pkh new` flow: the wizard on an interactive terminal, plain
 /// [`options::resolve`] otherwise (and with `--defaults`).
 pub async fn run(cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
@@ -154,7 +174,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         } else {
             SOURCE_HERE
         };
-        let answer = select_from("Where is the source code?", &options, default, |answer| {
+        let answer = select_from(SOURCE_LABEL, &options, default, |answer| {
             options.contains(&answer.to_string())
         })?;
         if answer == SOURCE_HERE {
@@ -234,7 +254,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
             .or_else(|| detect::sniff_license(&detect_dir));
         let (default, custom_default) = license_question_default(detected.as_deref());
         let options = license_menu();
-        let answer = select_from("License", &options, &default, |answer| {
+        let answer = select_from(LICENSE_LABEL, &options, &default, |answer| {
             options.contains(&answer.to_string())
         })?;
         if answer == LICENSE_OTHER {
@@ -304,7 +324,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         } else {
             "ubuntu".to_string()
         };
-        let answer = select_from("Target distribution", &options, &default, |answer| {
+        let answer = select_from(DIST_LABEL, &options, &default, |answer| {
             answer == "ubuntu" || answer == "debian"
         })?;
         cli.dist = Some(answer);
@@ -318,7 +338,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
     if cli.series.is_none() {
         match crate::distro_info::get_ordered_series_name(&dist).await {
             Ok(series) if !series.is_empty() => {
-                let answer = prompt::select("Target series", &series, &series[0])?;
+                let answer = prompt::select(SERIES_LABEL, &series, &series[0])?;
                 cli.series = Some(answer);
             }
             _ => {
@@ -552,11 +572,7 @@ fn license_question_default(probe_license: Option<&str>) -> (String, String) {
 /// identifier) is answered — the selector allows typing arbitrary text.
 fn select_template(options: &[String], default: &str) -> Result<TemplateId, Box<dyn Error>> {
     loop {
-        let answer = prompt::select(
+        let answer = prompt::select(LANGUAGE_LABEL, options, default)?;
-            "Which language/build system is your program using?",
-            options,
-            default,
-        )?;
         match TemplateId::from_label(&answer) {
             Some(id) => return Ok(id),
             None => log::warn!(
@@ -945,4 +961,17 @@ mod tests {
         assert!(required_answer("x")("").is_err());
         assert!(required_answer("x")("ok").is_ok());
     }
+
+    #[test]
+    fn select_labels_carry_their_own_separator() {
+        // prompt::select renders `> <label><answer>` verbatim; a label
+        // without a trailing separator glues the answer to the prompt
+        // (regression: the wizard once rendered "> LicenseMIT").
+        for label in SELECT_LABELS {
+            assert!(
+                label.ends_with(": ") || label.ends_with("? "),
+                "select label {label:?} lacks a trailing separator"
+            );
+        }
+    }
 }