Run "go fmt" on all .go files

about_concurrency.go

@@ -10,7 +10,7 @@ func isPrimeNumber(possiblePrime int) bool {
 }
 
 func findPrimeNumbers(channel chan int) {
-  for i := 2; /* infinite loop */ ; i++ {
+	for i := 2; ; /* infinite loop */ i++ {
 		// your code goes here
 
 		assert(i < 100) // i is afraid of heights

setup_koans_test.go

@@ -20,6 +20,7 @@ const (
 	__float32__      float32 = -1.0
 	__delete_me__    bool    = false
 )
+
 var __runner__ runner = nil
 
 func TestKoans(t *testing.T) {