DOC: Fix an obvious mistake in a message printed in doc/Makefile.
DOC: Fix an obvious mistake in a message printed in doc/Makefile.

endolith/numpy,grlee77/numpy,charris/numpy,jakirkham/numpy,madphysicist/numpy,numpy/numpy,pdebuyl/numpy,mattip/numpy,madphysicist/numpy,grlee77/numpy,madphysicist/numpy,mhvk/numpy,rgommers/numpy,simongibbons/numpy,rgommers/numpy,simongibbons/numpy,jakirkham/numpy,seberg/numpy,charris/numpy,pbrod/numpy,abalkin/numpy,charris/numpy,grlee77/numpy,seberg/numpy,anntzer/numpy,abalkin/numpy,pbrod/numpy,mattip/numpy,mhvk/numpy,pbrod/numpy,endolith/numpy,anntzer/numpy,charris/numpy,mhvk/numpy,pbrod/numpy,mhvk/numpy,pdebuyl/numpy,madphysicist/numpy,jakirkham/numpy,grlee77/numpy,anntzer/numpy,anntzer/numpy,simongibbons/numpy,jakirkham/numpy,seberg/numpy,mattip/numpy,rgommers/numpy,rgommers/numpy,simongibbons/numpy,madphysicist/numpy,seberg/numpy,jakirkham/numpy,pdebuyl/numpy,endolith/numpy,abalkin/numpy,numpy/numpy,mattip/numpy,mhvk/numpy,numpy/numpy,grlee77/numpy,numpy/numpy,pbrod/numpy,endolith/numpy,pdebuyl/numpy,simongibbons/numpy