Clarify early string exercise expectations.

Author: kentcdodds

exercises/01.expressions-and-output/01.problem.hello-world/README.mdx

@@ -24,7 +24,7 @@ console.log("Double quotes work too")
 	follow consistent style rules. If you have one installed (like
 	[Prettier](https://prettier.io/)), it may automatically change your quotes
 	when you save the file. For example, it might convert double quotes to single
-	quotes. That's okay! The code will still work the same way.
+	quotes. That's okay! The output stays the same either way.
 </callout-info>
 
 🐨 Once you've completed the exercise, run `node index.ts` in the playground to

exercises/01.expressions-and-output/02.problem.escaping-strings/README.mdx

@@ -49,4 +49,9 @@ console.log('Name:\tKody') // Prints with a tab between
 💰 Remember: use `\'` to escape single quotes, `\"` to escape double quotes,
 `\n` for newlines, and `\t` for tabs!
 
+<callout-info>
+	The playground also prints some extra output from `@kentcdodds/log-module`.
+	That's normal and not part of your `console.log()` calls.
+</callout-info>
+
 📜 [Escape sequences on MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#escape_sequences)

exercises/01.expressions-and-output/03.problem.strings/README.mdx

@@ -22,5 +22,6 @@ strings exactly as they are!
 
 <callout-warning>
 	If you're using an AI editor, the editor might try to avoid the extra `+`
-	because you can write this more easily without it.
+	because you can write this more easily without it. The tests for this step
+	check for `+` concatenation, so avoid template literals here.
 </callout-warning>