docs: shorten the readme and trim code comments

tests/test_audible.py

@@ -31,8 +31,7 @@ def calls(monkeypatch):
 
 
 def test_search_asks_for_the_first_page(calls):
-    """Audible's page parameter is 0-based: page=1 skips the only page of results
-    and a search like "Der Superpapagei" comes back empty."""
+    """Audible's page parameter is 0-based, page=1 skips the only page of hits."""
     results = asyncio.run(audible.search("Der Superpapagei"))
     assert [r.title for r in results] == ["Die drei ??? und der Super-Papagei"]
     assert calls and all(int(c["page"]) == 0 for c in calls)