Readme housekeeping

[skip ci]

Author: quchen

README.md

@@ -5,8 +5,10 @@
 A modern Wadler/Leijen Prettyprinter
 ====================================
 
-[![](https://img.shields.io/travis/quchen/prettyprinter/master.svg?style=flat-square&label=Master%20build)](https://travis-ci.org/quchen/prettyprinter)  
-[![](https://img.shields.io/hackage/v/prettyprinter.svg?style=flat-square&label=Hackage&colorB=0a7bbb)](https://hackage.haskell.org/package/prettyprinter) [![](https://www.stackage.org/package/prettyprinter/badge/lts?style=flat-square&colorB=0a7bbb)](https://www.stackage.org/package/prettyprinter) [![](https://www.stackage.org/package/prettyprinter/badge/nightly?style=flat-square&label=stackage%20nightly&colorB=0a7bbb)](https://www.stackage.org/package/prettyprinter)
+[![](https://img.shields.io/travis/quchen/prettyprinter/master.svg?style=flat-square&label=Master%20build)](https://travis-ci.org/quchen/prettyprinter)
+[![](https://img.shields.io/hackage/v/prettyprinter.svg?style=flat-square&label=Hackage&colorB=0a7bbb)](https://hackage.haskell.org/package/prettyprinter)
+[![](https://www.stackage.org/package/prettyprinter/badge/lts?style=flat-square&colorB=0a7bbb)](https://www.stackage.org/package/prettyprinter)
+[![](https://www.stackage.org/package/prettyprinter/badge/nightly?style=flat-square&label=stackage%20nightly&colorB=0a7bbb)](https://www.stackage.org/package/prettyprinter)
 
 
 
@@ -181,9 +183,9 @@ The most significant changes are:
   6. SimpleDoc was renamed `SimpleDocStream`, to contrast the new
      `SimpleDocTree`.
   7. In the ANSI backend, instead of providing an own colorization function for
-     each color/intensity/layer combination, they have been combined in /color/
-     /colorDull/, /bgColor/, and /bgColorDull/ functions, which can be found in
-     the ANSI terminal specific @prettyprinter-ansi-terminal@ package.
+     each color/intensity/layer combination, they have been combined in `color`,
+     `colorDull`, `bgColor`, and `bgColorDull` functions, which can be found in
+     the ANSI terminal specific `prettyprinter-ansi-terminal` package.