use 4 spaces instead of 2

Author: debris

styleguide.md

@@ -764,10 +764,10 @@
 
 ## Whitespace
 
-  - Use soft tabs set to 2 spaces.
+  - Use soft tabs set to 4 spaces.
 
     ```javascript
-    // bad
+    // good
     function() {
     ∙∙∙∙var name;
     }
@@ -777,7 +777,7 @@
     ∙var name;
     }
 
-    // good
+    // bad
     function() {
     ∙∙var name;
     }