src/sage/functions/piecewise.py: update test output

We can solve one additional integral in this file now that
abs_integrate is back.

Author: orlitzky

src/sage/functions/piecewise.py

@@ -799,16 +799,21 @@ def integral(self, parameters, variable, x=None, a=None, b=None, definite=False,
                           y|-->1/2*y^2 + 3*y + 9/2 on (-3, 0),
                           y|-->3*y + 9/2 on (0, +oo); y)
 
-            ::
+            The output from this can change a bit depending on the
+            version of Maxima used, so we test for equality with a
+            known result on the sole piece::
 
+                sage: # long time
                 sage: f1(x) = e^(-abs(x))
                 sage: f = piecewise([[(-infinity, infinity), f1]])
                 sage: result = f.integral(definite=True)
                 ...
                 sage: result
                 2
-                sage: f.integral()
-                piecewise(x|-->-integrate(e^(-abs(x)), x, x, +Infinity) on (-oo, +oo); x)
+                sage: actual = f.integral().expression_at(0) # only one piece
+                sage: expected = -1/2*e^(-x)*sgn(x) - 1/2*e^x*sgn(x) - 1/2*e^(-x) + 1/2*e^x + sgn(x) - 1
+                sage: bool(actual == expected)
+                True
 
             ::