Eliminated unnecessary differences in pull request

lib/spack/spack/directory_layout.py

@@ -37,7 +37,6 @@
 
 from spack.spec import Spec
 from spack.error import SpackError
-from spack.database import Database
 
 
 def _check_concrete(spec):
@@ -154,7 +153,6 @@ def remove_install_directory(self, spec):
             path = os.path.dirname(path)
 
 
-
 class YamlDirectoryLayout(DirectoryLayout):
     """Lays out installation directories like this::
            <install root>/

lib/spack/spack/package.py

@@ -557,7 +557,6 @@ def virtual_dependencies(self, visited=None):
 
     @property
     def installed(self):
-        print self.prefix
         return os.path.isdir(self.prefix)
 
 

lib/spack/spack/spec.py

@@ -427,6 +427,7 @@ def __init__(self, spec_like, *dep_like, **kwargs):
             spec = dep if isinstance(dep, Spec) else Spec(dep)
             self._add_dependency(spec)
 
+
     #
     # Private routines here are called by the parser when building a spec.
     #