Website Listing - No duplication authors

Uniquefy authors displayed - ensure that we don’t end up with duplicate entries

Addresses #8860

news/changelog-1.5.md

@@ -53,6 +53,7 @@ All changes included in 1.5:
 - ([#8435](https://github.com/quarto-dev/quarto-cli/issues/8435)): Improve listing filtering using special characters
 - ([#8627](https://github.com/quarto-dev/quarto-cli/issues/8627)): Localize the text that appears as placeholder in listing filters.
 - ([#8715](https://github.com/quarto-dev/quarto-cli/issues/8715)): Listings should respect `image: false`
+- ([#8860](https://github.com/quarto-dev/quarto-cli/discussions/8860)): Don't show duplicate author names.
 
 ## Manuscripts
 

src/project/types/website/listing/website-listing-read.ts

@@ -14,7 +14,7 @@ import {
   join,
   relative,
 } from "path/mod.ts";
-import { cloneDeep, orderBy } from "../../../../core/lodash.ts";
+import { cloneDeep, orderBy, uniq } from "../../../../core/lodash.ts";
 import { existsSync } from "fs/mod.ts";
 
 import { Format, Metadata } from "../../../../config/types.ts";
@@ -1117,8 +1117,10 @@ async function listItemFromFile(
       );
     }
     const author = structuredAuthors
-      ? structuredAuthors.map((auth) =>
-        auth.literal || `${auth.given} ${auth.family}`
+      ? uniq(
+        structuredAuthors.map((auth) =>
+          auth.literal || `${auth.given} ${auth.family}`
+        ),
       )
       : [];