Format cabal-install/tests/README.md
Format cabal-install/tests/README.md

[ci skip]

themoritz/cabal,Heather/cabal,sopvop/cabal,garetxe/cabal,sopvop/cabal,mydaum/cabal,kolmodin/cabal,sopvop/cabal,gbaz/cabal,Heather/cabal,headprogrammingczar/cabal,garetxe/cabal,kolmodin/cabal,bennofs/cabal,mydaum/cabal,themoritz/cabal,themoritz/cabal,gbaz/cabal,bennofs/cabal,headprogrammingczar/cabal,thomie/cabal,thomie/cabal