Fix typo in example (pointed out by a couple of people, most recently Ken Rimey)
diff --git a/Doc/library/concurrent.futures.rst b/Doc/library/concurrent.futures.rst
index 62d8eac..7ed99d5 100644
--- a/Doc/library/concurrent.futures.rst
+++ b/Doc/library/concurrent.futures.rst
@@ -146,7 +146,7 @@
# Start the load operations and mark each future with its URL
future_to_url = {executor.submit(load_url, url, 60):url for url in URLS}
for future in concurrent.futures.as_completed(future_to_url):
- url = future_to_url[url]
+ url = future_to_url[future]
try:
data = future.result()
except Exception as exc: