BUG: fix the conversion from .pyx.in to .pyx files
BUG: fix the conversion from .pyx.in to .pyx files

It got botched sometime around reviewing/merging/rebasing of gh-1924

rjeli/scikit-image,vighneshbirodkar/scikit-image,rjeli/scikit-image,pratapvardhan/scikit-image,vighneshbirodkar/scikit-image,ofgulban/scikit-image,ofgulban/scikit-image,rjeli/scikit-image,ofgulban/scikit-image,Hiyorimi/scikit-image,vighneshbirodkar/scikit-image,paalge/scikit-image,ajaybhat/scikit-image,paalge/scikit-image,paalge/scikit-image,Hiyorimi/scikit-image,pratapvardhan/scikit-image,ajaybhat/scikit-image