docs(std): add missing jsdoc comments to exported functions (#8442)

includes:
- http/file_server.ts
- testing/_diff.ts
- testing/asserts.ts

Relates to #7487

1 files changed, 5 insertions, 0 deletions

diff --git a/std/http/file_server.ts b/std/http/file_server.ts
index b75f9f9c1..331dbe5c5 100644
--- a/std/http/file_server.ts
+++ b/std/http/file_server.ts
@@ -112,6 +112,11 @@ function fileLenToString(len: number): string {
   return `${(len / base).toFixed(2)}${suffix[suffixIndex]}`;
 }
 
+/**
+ * Returns an HTTP Response with the requested file as the body
+ * @param req The server request context used to cleanup the file handle
+ * @param filePath Path of the file to serve
+ */
 export async function serveFile(
   req: ServerRequest,
   filePath: string,