RF: make more readable

talks/virtual_intro/intro.md

@@ -96,10 +96,10 @@ a.
 
 
 ```
-a = [1, 2, 3, 4, 5]
+mylist = [1, 2, 3, 4, 5]
 
-for elem in a:
-    print(elem)
+for element in mylist:
+    print(element)
 ```