Trac #32461: Fix symbolics doctest after #31873

failing in 9.5.beta0 with `sage -t`

as noted in https://trac.sagemath.org/ticket/32386#comment:104

URL: https://trac.sagemath.org/32461
Reported by: mkoeppe
Ticket author(s): Matthias Koeppe
Reviewer(s): Dima Pasechnik

src/doc/en/prep/Calculus.rst

@@ -339,7 +339,7 @@ If no antiderivative is found, the result is just the input::
 
     sage: result = integral(sinh(x^2+sqrt(x-1)),x)  # long time (15s on sage.math, 2012)
     ...
-    sage: result
+    sage: result  # long time
     integrate(sinh(x^2 + sqrt(x - 1)), x)
 
 This last one stumps other systems too.