Update style in test_c_reader
Update style in test_c_reader

Co-authored-by: Derek Homeier <955e65eba8e58aa01aa289170b3c5b72f3c4064d@gwdg.de>
mhvk/astropy,astropy/astropy,lpsinger/astropy,StuartLittlefair/astropy,larrybradley/astropy,larrybradley/astropy,pllim/astropy,mhvk/astropy,larrybradley/astropy,mhvk/astropy,mhvk/astropy,astropy/astropy,lpsinger/astropy,StuartLittlefair/astropy,pllim/astropy,lpsinger/astropy,StuartLittlefair/astropy,lpsinger/astropy,StuartLittlefair/astropy,astropy/astropy,StuartLittlefair/astropy,pllim/astropy,pllim/astropy,lpsinger/astropy,larrybradley/astropy,astropy/astropy,larrybradley/astropy,astropy/astropy,mhvk/astropy,pllim/astropy