Add top-level attributes for hg, svn, and git A-L packages

var/spack/repos/builtin/packages/er/package.py

@@ -30,11 +30,12 @@ class Er(CMakePackage):
 
     homepage = "https://github.com/ECP-VeloC/er"
     url      = "https://github.com/ECP-VeloC/er/archive/v0.0.1.zip"
-    tags     = ['ecp']
+    git      = "https://github.com/ecp-veloc/er.git"
 
+    tags = ['ecp']
+
+    version('master', branch='master')
     version('0.0.2', '24ad8f87bce2b6d900f1fb67452c3672')
-    version('master', git='https://github.com/ecp-veloc/er.git',
-            branch='master')
 
     depends_on('mpi')
     depends_on('kvtree')