ness01/sympy — comment on commit 8d1081b7ae533c860a2af0cdde2d5414a936a571
File:  line 0
By ness01:

Actually meijerg does not implement rewrite - should it?

Anyway, hyperexpand has a parameter allow_hyper which is usually set to false. In this case, a meijerg function will be changed into at most one hypergeometric function, if this is not possible it is returned unchanged. If allow_hyper is set to true then as many hypergeometric functions are returned as necessary (if possible).