*: apply go 1.19 formatter heuristics

And make manual corrections where needed. See the "Common mistakes
and pitfalls" section of https://tip.golang.org/doc/comment.

pkg/core/basic_chain_test.go

@@ -32,8 +32,8 @@ var (
 // TestCreateBasicChain generates "../rpc/testdata/testblocks.acc" file which
 // contains data for RPC unit tests. It also is a nice integration test.
 // To generate new "../rpc/testdata/testblocks.acc", follow the steps:
-// 		1. Set saveChain down below to true
-// 		2. Run tests with `$ make test`
+//  1. Set saveChain down below to true
+//  2. Run tests with `$ make test`
 func TestCreateBasicChain(t *testing.T) {
 	const saveChain = false