Refactoring for easier to read

lib/ansible/modules/cloud/amazon/s3.py

@@ -302,9 +302,7 @@ def is_walrus(s3_url):
 def get_md5_digest(local_file):
     md5 = hashlib.md5()
     with open(local_file, 'rb') as f:
-        while True:
-            data = f.read(1024 ** 2)
-            if not data: break
+        for data in f.read(1024 ** 2):
             md5.update(data)
     return md5.hexdigest()