docs(style-guide): fix folder structure in 04 to match what we do. (#2535)

closes issue #2533

Author: wardbell

public/docs/ts/latest/guide/style-guide.jade

@@ -1111,10 +1111,10 @@ a(href="#toc") Back to top
 
 a(id='file-tree')
 :marked
-  Folder and File Structure
+  Here is a compliant folder and file structure
 
 .filetree
-  .file src
+  .file <project root>
   .children
     .file app
     .children
@@ -1160,8 +1160,8 @@ a(id='file-tree')
         .file villains.module.ts
         .file villains-routing.module.ts
       .file app.component.ts|html|css|spec.ts
-    .file app.module.ts
-    .file app-routing.module.ts
+      .file app.module.ts
+      .file app-routing.module.ts
     .file main.ts
     .file index.html
     .file ...
@@ -1226,11 +1226,11 @@ a(href="#toc") Back to top
 
 .s-rule.do
   :marked
-    **Do** create an Angular module at the root of the application.
+    **Do** create an Angular module in the app's root folder (e.g., in `/app`).
 
 .s-why
   :marked
-    **Why?** Every app requires at least one Angular module.
+    **Why?** Every app requires at least one root Angular module.
 
 .s-rule.consider
   :marked