[DOC] Fix an example of series expansion.

This seems to have been forgotton. We've had predictable series
expansion since about 20 years now.

diff --git a/doc/tutorial/ginac.texi b/doc/tutorial/ginac.texi
index 52c5828e95a178e8d2de18d3e66d3fb3c7fb2adb..4add53adf8820bc53c4411b5b0e532d632d3c5cb 100644 (file)
--- a/doc/tutorial/ginac.texi
+++ b/doc/tutorial/ginac.texi
@@ -407,7 +407,7 @@ tan(x)^2+1
 > series(sin(x),x==0,4);
 x-1/6*x^3+Order(x^4)
 > series(1/tan(x),x==0,4);
-x^(-1)-1/3*x+Order(x^2)
+x^(-1)-1/3*x-1/45*x^3+Order(x^4)
 > series(tgamma(x),x==0,3);
 x^(-1)-Euler+(1/12*Pi^2+1/2*Euler^2)*x+
 (-1/3*zeta(3)-1/12*Pi^2*Euler-1/6*Euler^3)*x^2+Order(x^3)