diff --git a/15-slices/09-bouncing-ball-challenge/02-solution-draw-the-board/main.go b/15-slices/09-bouncing-ball-challenge/02-solution-draw-the-board/main.go
index cc5dd65..8e2897b 100644
--- a/15-slices/09-bouncing-ball-challenge/02-solution-draw-the-board/main.go
+++ b/15-slices/09-bouncing-ball-challenge/02-solution-draw-the-board/main.go
@@ -17,9 +17,9 @@ const (
 )
 
 func main() {
-	// // -------------------------------------------------
-	// // CREATE THE BOARD
-	// // -------------------------------------------------
+	// -------------------------------------------------
+	// CREATE THE BOARD
+	// -------------------------------------------------
 	board := make([][]bool, width)
 	for row := range board {
 		board[row] = make([]bool, height)
diff --git a/15-slices/09-bouncing-ball-challenge/03-solution-drawing-loop/main.go b/15-slices/09-bouncing-ball-challenge/03-solution-drawing-loop/main.go
index acac370..b90b16e 100644
--- a/15-slices/09-bouncing-ball-challenge/03-solution-drawing-loop/main.go
+++ b/15-slices/09-bouncing-ball-challenge/03-solution-drawing-loop/main.go
@@ -20,9 +20,9 @@ const (
 )
 
 func main() {
-	// // -------------------------------------------------
-	// // CREATE THE BOARD
-	// // -------------------------------------------------
+	// -------------------------------------------------
+	// CREATE THE BOARD
+	// -------------------------------------------------
 	board := make([][]bool, width)
 	for row := range board {
 		board[row] = make([]bool, height)
diff --git a/15-slices/09-bouncing-ball-challenge/04-solution-final/main.go b/15-slices/09-bouncing-ball-challenge/04-solution-final/main.go
index ad7d37b..dfa0834 100644
--- a/15-slices/09-bouncing-ball-challenge/04-solution-final/main.go
+++ b/15-slices/09-bouncing-ball-challenge/04-solution-final/main.go
@@ -20,9 +20,9 @@ const (
 )
 
 func main() {
-	// // -------------------------------------------------
-	// // CREATE THE BOARD
-	// // -------------------------------------------------
+	// -------------------------------------------------
+	// CREATE THE BOARD
+	// -------------------------------------------------
 	board := make([][]bool, width)
 	for row := range board {
 		board[row] = make([]bool, height)
diff --git a/16-strings-revisited/03-string-indexing-slicing/main.go b/16-strings-revisited/03-string-indexing-slicing/main.go
index a47df4b..c0c8d77 100644
--- a/16-strings-revisited/03-string-indexing-slicing/main.go
+++ b/16-strings-revisited/03-string-indexing-slicing/main.go
@@ -29,7 +29,7 @@ func main() {
 	//  | ||||
 	// "wandering"
 
-	//           "w"     + "a" + "nder"   + "ing"
+	//              "w"     + "a" + "nder"   + "ing"
 
 	// wandering := mood[0] + "a" + mood[2:] + "ing"
 	// fmt.Printf("mood[0]   : %T - %[1]v\n", mood[0])   // byte