Improve comments in template 01

This fixes some typos and grammar mistakes and improves clarity of some
comments in templates/01-hello-username

templates/01-hello-username/assembly/main.ts

@@ -11,14 +11,15 @@ export function sayHi(): void {
   // context.sender is the account_id of the user who sent this call to the contract
   // It's provided by the Blockchain runtime. For now we just store it in a local variable.
   let sender = context.sender;
-  // `near` class contains some helper functions, e.g. logging.
+
+  // `near-runtime-ts` contains some helper classes, e.g. `logging`
   // Logs are not persistently stored on the blockchain, but produced by the blockchain runtime.
   // It's helpful to use logs for debugging your functions or when you need to get some info
   // from the change methods (since change methods don't return values to the front-end).
   logging.log(sender + " says \"Hi!\"");
+
   // storage is a helper class that allows contracts to modify the persistent state
   // and read from it. setString allows you to persitently store a string value for a given string key.
-  // We'll store the last sender of this contract who called this method.
   storage.setString(LAST_SENDER_KEY, sender);
 }
 

templates/01-hello-username/src/config.js

@@ -1,5 +1,5 @@
 (function() {
-  const CONTRACT_NAME = 'near-hello-devnet'; /* TODO: fill this in! */
+  const CONTRACT_NAME = 'near-hello-devnet';
   const DEFAULT_ENV = 'development';
 
   function getConfig(env) {

templates/01-hello-username/src/main.js

@@ -9,12 +9,14 @@ async function initContract() {
   // is hosted at https://wallet.nearprotocol.com
   window.walletAccount = new nearlib.WalletAccount(window.near);
 
-  // Getting the Account ID. If unauthorized yet, it's just empty string.
+  // Getting the Account ID. If currently unauthorized, it's just empty string.
   window.accountId = window.walletAccount.getAccountId();
 
   // Initializing our contract APIs by contract name and configuration.
   window.contract = await near.loadContract(nearConfig.contractName, {
     // NOTE: This configuration only needed while NEAR is still in development
+    // See https://github.com/nearprotocol/NEPs/pull/3
+
     // View methods are read only. They don't modify the state, but usually return some value.
     viewMethods: ['whoSaidHi'],
     // Change methods can modify the state. But you don't receive the returned value when called.
@@ -38,7 +40,7 @@ async function doWork() {
 function signedOutFlow() {
   // Displaying the signed out flow container.
   Array.from(document.querySelectorAll('.signed-out')).forEach(el => el.style.display = '');
-  // Adding an event to a sing-in button.
+  // Adding an event to a sign-in button.
   document.getElementById('sign-in').addEventListener('click', () => {
     window.walletAccount.requestSignIn(
       // The contract name that would be authorized to be called by the user's account.
@@ -65,7 +67,7 @@ function signedInFlow() {
     window.contract.sayHi().then(updateWhoSaidHi);
   });
 
-  // Adding an event to a sing-out button.
+  // Adding an event to a sign-out button.
   document.getElementById('sign-out').addEventListener('click', e => {
     e.preventDefault();
     walletAccount.signOut();