fix: rendering in typst

src/export/practice.rs

@@ -259,11 +259,10 @@ pub fn render(catalog: &Catalog, record: &AssessmentFile, opts: &Options) -> Res
 
 /// The Quarto YAML front matter.
 fn front_matter(course: &CourseFile, record: &AssessmentFile, variant: Variant) -> String {
-    let title = if matches!(variant, Variant::Solutions) {
-        format!("{}: {}", record.assessment.title, variant.title_word())
-    } else {
-        record.assessment.title.clone()
-    };
+    // Both documents name themselves. Two PDFs called "Homework 1" are
+    // indistinguishable in a downloads folder, which is how a solutions copy
+    // gets posted in place of the worksheet.
+    let title = format!("{}: {}", record.assessment.title, variant.title_word());
     let subtitle = format!("{} · {}", course.course.code, course.course.title);
     let mut out = String::from("---\n");
     out.push_str(&format!("title: \"{}\"\n", yaml_quote(&title)));
@@ -663,13 +662,18 @@ items:
             &Options::default().form,
         )
         .expect("renders");
-        assert!(ws.contains("title: \"Homework 1: Questions\""));
+        assert!(ws.contains("title: \"Homework 1: Questions\""), "{ws}");
         let sol = solutions(
             &catalog("front-matter-sol"),
             &record(),
             &Options::default().form,
         )
         .expect("renders");
-        assert!(sol.contains("title: \"Homework 1: Solutions\""));
+        assert!(sol.contains("title: \"Homework 1: Solutions\""), "{sol}");
+        // Neither document may title itself with the bare assessment name: two
+        // PDFs called "Homework 1" are indistinguishable once downloaded, and
+        // the pair that gets confused is the one with the answers in it.
+        assert!(!ws.contains("title: \"Homework 1\""), "{ws}");
+        assert!(!sol.contains("title: \"Homework 1\""), "{sol}");
     }
 }