test: Implicitly sync after generate*, unless opted out

test/functional/example_test.py

@@ -141,8 +141,7 @@ class ExampleTest(BitcoinTestFramework):
         peer_messaging = self.nodes[0].add_p2p_connection(BaseNode())
 
         # Generating a block on one of the nodes will get us out of IBD
-        blocks = [int(self.generate(self.nodes[0], nblocks=1)[0], 16)]
-        self.sync_all(self.nodes[0:2])
+        blocks = [int(self.generate(self.nodes[0], sync_fun=lambda: self.sync_all(self.nodes[0:2]), nblocks=1)[0], 16)]
 
         # Notice above how we called an RPC by calling a method with the same
         # name on the node object. Notice also how we used a keyword argument