diff --git a/music-pitch-literal.cabal b/music-pitch-literal.cabal
--- a/music-pitch-literal.cabal
+++ b/music-pitch-literal.cabal
@@ -1,7 +1,7 @@
 
 name:               music-pitch-literal
-version:            1.3
-cabal-version:      >= 1.2
+version:            1.3.1
+cabal-version:      >= 1.10
 author:             Hans Hoglund
 maintainer:         Hans Hoglund
 license:            BSD3
@@ -17,10 +17,15 @@
 
     This library is part of the Music Suite, see <http://musicsuite.github.com>.
 
+source-repository head
+  type:             git
+  location:         git://github.com/hanshoglund/music-pitch-literal.git
+  
 library                    
     build-depends: 
         base >= 4 && < 5
     hs-source-dirs: src
+    default-language: Haskell2010
     exposed-modules:
         Music.Pitch.Literal
     
diff --git a/src/Music/Pitch/Literal.hs b/src/Music/Pitch/Literal.hs
--- a/src/Music/Pitch/Literal.hs
+++ b/src/Music/Pitch/Literal.hs
@@ -17,8 +17,8 @@
 
 module Music.Pitch.Literal (
 
-        PitchL(..),
         IsPitch(..),
+        PitchL(..),
 
         cs'', ds'', es'', fs'', gs'', as'', bs'',
         c'' , d'' , e'' , f'' , g'' , a'' , b'' ,
@@ -42,17 +42,18 @@
   ) where
 
 -- |
--- The 'PitchL' types is used to encode a pitch literal.
+-- The 'PitchL' types is used to encode a pitch literal. You don't need to
+-- think about this type unless you are implementing 'IsPitch'.
 --
--- It is defined as /(class, alteration, octave)/, where
+-- It is defined as @(class, alteration, octave)@, where
 --
---     * /class/      is a pitch class number in /[0,6]/, starting from C.
+--     * @class@      is a pitch class number in @[0..6]@, starting from C.
 --
---     * /alteration/ is the number of semitones, i.e. 0 is natural, 1 for sharp 2 for double sharp, -1 for flat and -2 for double flat.
+--     * @alteration@ is the number of semitones, i.e. 0 is natural, 1 for sharp 2 for double sharp, -1 for flat and -2 for double flat.
 --       Alteration is in 'Maybe' because some pitch representations differ between explicit and explicit accidentals, i.e. a diatonic
 --       pitch type may assume @(0,Nothing,4)@ to mean C sharp rather than C.
 --
---     * /octave/     is octave number in scientific pitch notation.
+--     * @octave@     is octave number in scientific pitch notation.
 --
 -- Middle C is represented by the pitch literal @(0, Nothing, 4)@.
 --