Clarify which name should be used for the package

Author: izuzak

book/03-hacking-atom/sections/03-modify-buffer.asc

@@ -19,7 +19,7 @@ The final package can be viewed at https://github.com/atom/ascii-art.
 
 To begin, press `cmd-shift-P` to bring up the https://github.com/atom/command-palette[Command
 Palette]. Type "generate package" and
-select the "Package Generator: Generate Package" command, just as we did in <<_generate_package>>.
+select the "Package Generator: Generate Package" command, just as we did in <<_generate_package>>. Enter `ascii-art` as the name of the package.
 
 Now let's edit the package files to make our ASCII Art package do something interesting. Since this package doesn't need any UI, we can remove all view-related code so go ahead and delete `lib/ascii-art-view.coffee`, `spec/ascii-art-view-spec.coffee`, and `styles/`.