Fixed syntax error in travis file

Author: ameingast

.travis.yml

@@ -29,6 +29,5 @@ script:
  - cabal test
  - cabal check
  - cabal sdist
-
-- SRC_TGZ=$(cabal info . | awk '{print $2;exit}').tar.gz &&
-  (cd dist && cabal install --force-reinstalls "$SRC_TGZ")
+ - SRC_TGZ=$(cabal info . | awk '{print $2;exit}').tar.gz &&
+   (cd dist && cabal install --force-reinstalls "$SRC_TGZ")