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/testing/_diff.ts b/std/testing/_diff.ts
index 5c84e891f..e6f631002 100644
--- a/std/testing/_diff.ts
+++ b/std/testing/_diff.ts
@@ -36,6 +36,11 @@ function createCommon<T>(A: T[], B: T[], reverse?: boolean): T[] {
   return common;
 }
 
+/**
+ * Renders the differences between the actual and expected values
+ * @param A Actual value
+ * @param B Expected value
+ */
 export function diff<T>(A: T[], B: T[]): Array<DiffResult<T>> {
   const prefixCommon = createCommon(A, B);
   const suffixCommon = createCommon(