fix: separate raised citation markers with a space, not a comma (#23)

src/__tests__/citations.test.ts

@@ -127,10 +127,10 @@ describe("linkCitations", () => {
     expect(linkCitations("Rain [^1].", sources).text).toBe("Rain [¹](https://first.example).");
   });
 
-  it("links a list of markers and keeps the comma", () => {
+  it("separates markers written as one list", () => {
     const result = linkCitations("Both [1, 3] agree.", sources);
 
-    expect(result.text).toBe("Both [¹](https://first.example), [³](https://third.example) agree.");
+    expect(result.text).toBe("Both [¹](https://first.example) [³](https://third.example) agree.");
     expect([...result.cited].sort()).toEqual([1, 3]);
   });
 
@@ -148,13 +148,13 @@ describe("linkCitations", () => {
     // says it is two sources, or where the first one stops and the second begins.
     const result = linkCitations("Both [1][3] agree.", sources);
 
-    expect(result.text).toBe("Both [¹](https://first.example), [³](https://third.example) agree.");
+    expect(result.text).toBe("Both [¹](https://first.example) [³](https://third.example) agree.");
     expect([...result.cited].sort()).toEqual([1, 3]);
   });
 
   it("treats a space between two markers the same way", () => {
     expect(linkCitations("Both [1] [3] agree.", sources).text).toBe(
-      "Both [¹](https://first.example), [³](https://third.example) agree.",
+      "Both [¹](https://first.example) [³](https://third.example) agree.",
     );
   });
 

src/lib/citations.ts

@@ -228,9 +228,11 @@ export function linkCitations(text: string, sources: Source[]): CitationResult {
       }
 
       for (const index of wanted) cited.add(index);
-      // Separated even when the model wrote them touching: `¹, ²` is two citations,
+      // Separated even when the model wrote them touching: `¹ ²` is two citations,
       // where `¹²` is a number, and the reader has no way to tell it from a real one.
-      return links.join(", ");
+      // A space rather than a comma, which sits at the baseline and so drops away from
+      // digits that are raised above it.
+      return links.join(" ");
     }),
   );