Merge bitcoin/bitcoin#23474: test: scripted-diff cleanups after generate* changes

fac23c2 scripted-diff: Bump copyright headers (MarcoFalke)
fa974f1 scripted-diff: Remove redundant sync_all and sync_blocks (MarcoFalke)
fad1399 test: Properly set sync_fun in NodeNetworkLimitedTest (MarcoFalke)
faeff57 test: Use 4 spaces for indentation (MarcoFalke)

Pull request description:

  Some cleanups after commit 94db963

ACKs for top commit:
  fanquake:
    ACK fac23c2

Tree-SHA512: 5acfd5bb9679b41969d0fc6fc85801ccadcd6530ea692bac6352668e06fc7a9b0e1db3fd6fba435e84afe983d2eb07bd0a47c8364462bb7110004bd3d102b698

Author: fanquake

test/functional/combine_logs.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2017-2019 The Bitcoin Core developers
+# Copyright (c) 2017-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Combine logs from multiple bitcoin nodes as well as the test_framework log.

test/functional/data/invalid_txs.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2015-2020 The Bitcoin Core developers
+# Copyright (c) 2015-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """

test/functional/example_test.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2017-2020 The Bitcoin Core developers
+# Copyright (c) 2017-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """An example functional test

test/functional/feature_abortnode.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2019-2020 The Bitcoin Core developers
+# Copyright (c) 2019-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test bitcoind aborts if can't disconnect a block.

test/functional/feature_anchors.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2020 The Bitcoin Core developers
+# Copyright (c) 2020-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test block-relay-only anchors functionality"""

test/functional/feature_asmap.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2020 The Bitcoin Core developers
+# Copyright (c) 2020-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test asmap config argument for ASN-based IP bucketing.

test/functional/feature_assumevalid.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2014-2020 The Bitcoin Core developers
+# Copyright (c) 2014-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test logic for skipping signature validation on old blocks.

test/functional/feature_backwards_compatibility.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2018-2020 The Bitcoin Core developers
+# Copyright (c) 2018-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Backwards compatibility functional test
@@ -66,8 +66,6 @@ def setup_nodes(self):
     def run_test(self):
         self.generatetoaddress(self.nodes[0], COINBASE_MATURITY + 1, self.nodes[0].getnewaddress())
 
-        self.sync_blocks()
-
         # Sanity check the test framework:
         res = self.nodes[self.num_nodes - 1].getblockchaininfo()
         assert_equal(res['blocks'], COINBASE_MATURITY + 1)
@@ -93,15 +91,13 @@ def run_test(self):
         self.nodes[0].sendtoaddress(address, 10)
         self.sync_mempools()
         self.generate(self.nodes[0], 1)
-        self.sync_blocks()
         # Create a conflicting transaction using RBF
         return_address = self.nodes[0].getnewaddress()
         tx1_id = self.nodes[1].sendtoaddress(return_address, 1)
         tx2_id = self.nodes[1].bumpfee(tx1_id)["txid"]
         # Confirm the transaction
         self.sync_mempools()
         self.generate(self.nodes[0], 1)
-        self.sync_blocks()
         # Create another conflicting transaction using RBF
         tx3_id = self.nodes[1].sendtoaddress(return_address, 1)
         tx4_id = self.nodes[1].bumpfee(tx3_id)["txid"]

test/functional/feature_bind_extra.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2014-2021 The Bitcoin Core developers
+# Copyright (c) 2014-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """

test/functional/feature_bip68_sequence.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2014-2020 The Bitcoin Core developers
+# Copyright (c) 2014-2021 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test BIP68 implementation."""