[#314 Wrong answer for integrate(2*atan(x)/(1+x^2),x)] fixing typo

[Igor Khavkine]

Changes 
http://wiki.axiom-developer.org/314WrongAnswerForIntegrate2AtanX1X2X/diff
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That should have been:
\begin{axiom}
integrate(2*atan(x)/(1+x^2),x)
\end{axiom}
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forwarded from http://wiki.axiom-developer.org/[EMAIL PROTECTED]