fix doctest
fix doctest

jayhetee/dask,wiso/dask,jakirkham/dask,jakirkham/dask,chrisbarber/dask,marianotepper/dask,dask/dask,mraspaud/dask,mikegraham/dask,hainm/dask,wiso/dask,blaze/dask,cowlicks/dask,clarkfitzg/dask,mraspaud/dask,ssanderson/dask,PhE/dask,ContinuumIO/dask,hainm/dask,vikhyat/dask,cpcloud/dask,minrk/dask,simudream/dask,gameduell/dask,vikhyat/dask,jayhetee/dask,pombredanne/dask,jcrist/dask,freeman-lab/dask,freeman-lab/dask,esc/dask,mrocklin/dask,minrk/dask,ssanderson/dask,clarkfitzg/dask,marianotepper/dask,dask/dask,mrocklin/dask,esc/dask,PhE/dask,blaze/dask,pombredanne/dask,jcrist/dask,ContinuumIO/dask,simudream/dask