Merge PR #3498: various improvements to gaiad gentx/init

docs/gaia/deploy-testnet.md

@@ -26,7 +26,7 @@ This guide helps you create a single validator node that runs a network locally
 cd $HOME
 
 # Initialize the genesis.json file that will help you to bootstrap the network
-gaiad init --chain-id testing --moniker testing
+gaiad init --chain-id=testing testing
 
 # Create a key to hold your validator account
 gaiacli keys add validator

docs/gaia/join-testnet.md

@@ -19,11 +19,11 @@ These instructions are for setting up a brand new full node from scratch.
 First, initialize the node and create the necessary config files:
 
 ```bash
-gaiad init --moniker <your_custom_moniker>
+gaiad init <your_custom_moniker>
 ```
 
 ::: warning Note
-Only ASCII characters are supported for the `--moniker`. Using Unicode characters will render your node unreachable.
+Monikers can contain only ASCII characters. Using Unicode characters will render your node unreachable.
 :::
 
 You can edit this `moniker` later, in the `~/.gaiad/config/config.toml` file: