Adjust some horizontal indentation to be consistent with the style used

throughout the documentation.

Doc/tut/tut.tex

@@ -1234,11 +1234,11 @@ which searches for prime numbers:
 >>> for n in range(2, 10):
 ...     for x in range(2, n):
 ...         if n % x == 0:
-...            print n, 'equals', x, '*', n/x
-...            break
+...             print n, 'equals', x, '*', n/x
+...             break
 ...     else:
-...          # loop fell through without finding a factor
-...          print n, 'is a prime number'
+...         # loop fell through without finding a factor
+...         print n, 'is a prime number'
 ... 
 2 is a prime number
 3 is a prime number