normalize spacing and add syntax-highlighted code fences
normalize spacing and add syntax-highlighted code fences

There were a few different styles in the README code examples, so I normalized
on 4-space indents and 8-space hanging indents.

YannRobert/Ektorp,Arcticwolf/Ektorp,Arcticwolf/Ektorp,maoueh/Ektorp,helun/Ektorp,taktik/Ektorp,helun/Ektorp,taktik/Ektorp,YannRobert/Ektorp,maoueh/Ektorp