Mainly for Ralf...

--------------------------
https://github.com/fricas/fricas/blob/master/src/doc/htex/ug06.htex#L2410
REPLACE:
(s.i = s.j) and palAux?(s,i+1,i-1)
BY:
(s.i = s.j) and palAux?(s,i+1,j-1)
MOTIVATION:
IIUC, presently the function palAux? declare palindromes aggregates having 
equal first and last element.
This results in an wrong stream FricasUG sec 6.20, pag 218, (9)
The nine-th term
1111111111^2 = 1234567900987654321
is NOT palindrome and false would have been expected.

--------------------------
https://github.com/fricas/fricas/blob/master/src/doc/htex/ug06.htex#L2735
REPLACE:
\spadcommand{eirule integral(sin u + exp u/u, u) \free{eirule}}
BY eg:
\spadcommand{eirule integral((sin u + exp u)/u, u) \free{eirule}}
MOTIVATION:
The current example does not test the ?y pattern in FricasUG sec 6.21, pag 223, 
(17) as anticipated in the text.

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