chore: improve range examples

Author: p7nov

examples/02_control_flow/03_Ranges.md

@@ -56,13 +56,13 @@ Ranges are also useful in `if` statements:
 fun main() {
 //sampleStart
     val x = 2
-    if (x in 1..10) {            // 1
-        print(x)
+    if (x in 1..5) {            // 1
+        print("x is in range from 1 to 5")
     }
-    print(" ")
+    println()
 
-    if (x !in 1..4) {            // 2
-        print(x)
+    if (x !in 6..10) {          // 2
+        print("x is not in range from 6 to 10")
     }
 //sampleEnd
 }