scripted-diff: Use generate* from TestFramework

-BEGIN VERIFY SCRIPT-
 sed --regexp-extended -i \
     's/((self\.)?(nodes\[[^]]+\]|[a-z_]*(wallet|node)[0-9a-z_]*))\.(generate(|toaddress|block|todescriptor)(\(|, ))/self.\5\1, /g' \
     $(git grep -l generate ./test | grep -v 'test_framework/' | grep -v 'feature_rbf')
-END VERIFY SCRIPT-

test/functional/example_test.py

@@ -141,7 +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.nodes[0].generate(nblocks=1)[0], 16)]
+        blocks = [int(self.generate(self.nodes[0], nblocks=1)[0], 16)]
         self.sync_all(self.nodes[0:2])
 
         # Notice above how we called an RPC by calling a method with the same