17505: fix latex, cosmetics

src/sage/functions/other.py

@@ -2617,7 +2617,7 @@ def _print_latex_(self, x, var, a, b):
             sage: latex(ssum(x^2, x, 1, 10))
             \sum_{x=1}^{10} x^2
         """
-        return r"\sum_{{{}={}}}^{{{}}} {}".format(var, a, b, x)
+        return r"{{\sum_{{{}={}}}^{{{}}} {}}}".format(var, a, b, x)
 
 symbolic_sum = Function_sum()
 
@@ -2664,6 +2664,6 @@ def _print_latex_(self, x, var, a, b):
             sage: latex(sprod(x^2, x, 1, 10))
             \prod_{x=1}^{10} x^2
         """
-        return r"\prod_{{{}={}}}^{{{}}} {}".format(var, a, b, x)
+        return r"{{\prod_{{{}={}}}^{{{}}} {}}}".format(var, a, b, x)
 
 symbolic_product = Function_prod()

src/sage/interfaces/maxima_lib.py

@@ -902,17 +902,14 @@ def sr_sum(self,*args):
 
     def sr_prod(self,*args):
         """
-        Helper function to wrap calculus use of Maxima's summation.
+        Helper function to wrap calculus use of Maxima's product.
         """
         try:
             return max_to_sr(maxima_eval([[max_ratsimp],[[max_simplify_prod],([max_prod],[sr_to_max(SR(a)) for a in args])]]));
         except RuntimeError as error:
             s = str(error)
             if "divergent" in s:
-# in pexpect interface, one looks for this;
-# could not find an example where 'Pole encountered' occurred, though
-#            if "divergent" in s or 'Pole encountered' in s:
-                raise ValueError("Sum is divergent.")
+                raise ValueError("Product is divergent.")
             elif "Is" in s: # Maxima asked for a condition
                 self._missing_assumption(s)
             else: