trailingCommas:all on prettier (#38888)

lib/path-utils.js

@@ -12,7 +12,7 @@ const supportedVersions = new Set(Object.keys(allVersions))
 export function getPathWithLanguage(href, languageCode) {
   return slash(path.posix.join('/', languageCode, getPathWithoutLanguage(href))).replace(
     patterns.trailingSlash,
-    '$1'
+    '$1',
   )
 }