change sw and ts to 3

Author: Sean Chang

plugin/31-create-scala.vim

@@ -45,7 +45,7 @@ function! MakeScalaFile()
     "norm G
     "call append(".", "} /// end of " . class)
 
-    call append(".", "// vim: set ts=4 sw=4 et:")
+    call append(".", "// vim: set ts=3 sw=3 et:")
     call append(".", "")
 
 endfunction