Fix cabal file.

diff --git a/yaml-rpc.cabal b/yaml-rpc.cabal
index a435bb5..367c8ae 100644
--- a/yaml-rpc.cabal
+++ b/yaml-rpc.cabal
@@ -37,7 +37,7 @@ Build-type:          Simple

 -- Extra files to be distributed with the package, such as examples or
 -- a README.
--- Extra-source-files:
+Extra-source-files:  README Test.hs TestCall.hs

 -- Constraint on the version of Cabal needed to build this package.
 Cabal-version:       >=1.4