some tweaks

src/01-hello.go

@@ -1,3 +1,5 @@
+                                // Hello World
+
                                 // Here's an example Go program.
 
 package main

src/02-values.go

@@ -1,3 +1,5 @@
+                                       // Vaules
+
                                        // Go has various value types, including strings,
                                        // different types of numbers, booleans, etc.
 

src/05-variable.go

@@ -1,4 +1,4 @@
-                                  // # Variables
+                                  // Variables
 
 package main