message: doc: update developer notes for signet
diff: @@ -14,7 +14,7 @@ Developer Notes
  - [Compiling for debugging](#compiling-for-debugging)
  - [Compiling for gprof profiling](#compiling-for-gprof-profiling)
  - [`debug.log`](#debuglog)
  - - [Testnet and Regtest modes](#testnet-and-regtest-modes)
  + - [Signet, testnet, and regtest modes](#signet-testnet-and-regtest-modes)
  - [DEBUG_LOCKORDER](#debug_lockorder)
  - [Valgrind suppressions file](#valgrind-suppressions-file)
  - [Compiling for test coverage](#compiling-for-test-coverage)
  @@ -259,14 +259,14 @@ on all categories (and give you a very large `debug.log` file).
  The Qt code routes `qDebug()` output to `debug.log` under category "qt": run with `-debug=qt`
  to see it.
  -### Testnet and Regtest modes
  +### Signet, testnet, and regtest modes
  Run with the `-testnet` option to run with "play peercoins" on the test network, if you
  are testing multi-machine code that needs to operate across the internet.
  -If you are testing something that can run on one machine, run with the `-regtest` option.
  -In regression test mode, blocks can be created on-demand; see [test/functional/](/test/functional) for tests
  -that run in `-regtest` mode.
  +If you are testing something that can run on one machine, run with the
  +`-regtest` option. In regression test mode, blocks can be created on demand;
  +see [test/functional/](/test/functional) for tests that run in `-regtest` mode.
  ### DEBUG_LOCKORDER
  