Add more tests to _examples/colors256.go

_examples/colors256.go

@@ -37,20 +37,33 @@ func layout(g *gocui.Gui) error {
 			return err
 		}
 
-		var count int
-		for i := 1; i <= 255; i++ {
-			count++
+		// 256-colors escape codes
+		for i := 0; i < 256; i++ {
+			str := fmt.Sprintf("\x1b[48;5;%dm\x1b[30m%3d\x1b[0m ", i, i)
+			str += fmt.Sprintf("\x1b[38;5;%dm%3d\x1b[0m ", i, i)
 
-			block := fmt.Sprintf("\x1b[48;5;%dm%3s\x1b[0m", i, "  ")
-			str := fmt.Sprintf("\x1b[38;5;%dm%3d %s\x1b[0m\t", i, i, block)
+			if (i+1)%10 == 0 {
+				str += "\n"
+			}
 
-			if count == 10 {
-				str += "\n\n"
-				count = 0
+			fmt.Fprint(v, str)
+		}
+
+		fmt.Fprint(v, "\n\n")
+
+		// 8-colors escape codes
+		ctr := 0
+		for i := 0; i <= 7; i++ {
+			for _, j := range []int{1, 4, 7} {
+				str := fmt.Sprintf("\x1b[3%d;%dm%d:%d\x1b[0m ", i, j, i, j)
+				if (ctr+1)%20 == 0 {
+					str += "\n"
 				}
 
 				fmt.Fprint(v, str)
 
+				ctr++
+			}
 		}
 	}
 	return nil