Update app.py

app.py

@@ -19,7 +19,9 @@ def sum_of_two(a,b):
         return(sum1)
 
 def start_iteration(a):
-    num_set = "Printing current and previous number sum in a range(10):"
+    num_set = '''
+                Printing current and previous number sum in a range(10):
+                '''
     temp = a
     for i in range(a,a+10):
         if temp == a: