Update coding_style.rst
Update coding_style.rst

Added links to PEP 8 and 263 and improved some text
ericchaves/faker,beetleman/faker,joke2k/faker,trtd/faker,GLMeece/faker,venmo/faker,danhuss/faker,meganlkm/faker,joke2k/faker,thedrow/faker,yiliaofan/faker,MaryanMorel/faker,johnraz/faker,HAYASAKA-Ryosuke/faker,xfxf/faker-python,xfxf/faker-1,jaredculp/faker