add a couple of whitespace tests for signature parsing in C code
add a couple of whitespace tests for signature parsing in C code

numpy/numpy,jakirkham/numpy,simongibbons/numpy,mhvk/numpy,jakirkham/numpy,pdebuyl/numpy,charris/numpy,jakirkham/numpy,endolith/numpy,simongibbons/numpy,endolith/numpy,anntzer/numpy,pdebuyl/numpy,seberg/numpy,pdebuyl/numpy,mattip/numpy,mhvk/numpy,jakirkham/numpy,anntzer/numpy,endolith/numpy,rgommers/numpy,rgommers/numpy,endolith/numpy,mhvk/numpy,jakirkham/numpy,mattip/numpy,rgommers/numpy,anntzer/numpy,simongibbons/numpy,numpy/numpy,seberg/numpy,simongibbons/numpy,mattip/numpy,charris/numpy,anntzer/numpy,mhvk/numpy,pdebuyl/numpy,rgommers/numpy,charris/numpy,numpy/numpy,charris/numpy,numpy/numpy,mhvk/numpy,seberg/numpy,mattip/numpy,seberg/numpy,simongibbons/numpy