README.md in rasn1-0.6.3 vs README.md in rasn1-0.6.4

@@ -53,11 +53,11 @@
 
 ```ruby
 class ComplexRecord < RASN1::Model
   sequence :cplx_record,
            content: [boolean(:bool),
-	                 octet_string(:data, explicit: 0),
-		             model(:a_record, Record)]
+                     octet_string(:data, explicit: 0),
+                     model(:a_record, Record)]
 end
 ```
 
 ### Parse a DER-encoded string
 ```ruby