Update doctests for SymPy 1.11

Doctests related to SymPy's rsolve function are updated in: src/sage/calculus/test_sympy.py src/sage/tests/books/computational-mathematics-with-sagemath/recequadiff_doctest.py The form of the output from SymPy has changed since sympy/sympy#23567
sagemath · Jul 11, 2022 · 04d0344 · 04d0344
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diff --git a/src/sage/calculus/test_sympy.py b/src/sage/calculus/test_sympy.py
@@ -193,7 +193,7 @@
     sage: u = Function('u')
     sage: n = Symbol('n', integer=True)
     sage: f = u(n+2) - u(n+1) + u(n)/4
-    sage: 2**n * rsolve(f,u(n))
-    C1*n + C0
+    sage: expand(2**n * rsolve(f,u(n)))
+    2*C1*n + C0
 
 """
diff --git a/src/sage/tests/books/computational-mathematics-with-sagemath/recequadiff_doctest.py b/src/sage/tests/books/computational-mathematics-with-sagemath/recequadiff_doctest.py
@@ -382,7 +382,7 @@
   sage: from sympy import rsolve_hyper
   sage: from sympy.abc import n
   sage: rsolve_hyper([-2,1],2**(n+2),n)
-  2**n*C0 + 2**(n + 2)*(C0 + n/2)
+  2**n*C0 + 2**(n + 1)*n
 
 """