Fix style issues

Author: greenc-FNAL

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

@@ -125,6 +125,7 @@ def url_for_version(self, version):
         "broken for versions of MSVC supported by Spack",
     )
 
+
 class AutotoolsBuilder(spack.build_systems.autotools.AutotoolsBuilder):
     @when("@:1.43")
     def autoreconf(self, pkg, spec, prefix):

var/spack/repos/builtin/packages/perl-mozilla-publicsuffix/package.py

@@ -7,6 +7,7 @@
 
 from llnl.util.filesystem import filter_file
 
+import spack.build_systems.perl
 from spack.package import *
 
 

var/spack/repos/builtin/packages/singularity-eos/package.py

@@ -118,7 +118,7 @@ class SingularityEos(CMakePackage, CudaPackage):
     depends_on("kokkos +wrapper+cuda_lambda", when="+cuda+kokkos")
 
     # fix for older spacks
-    if spack.version.Version(spack.spack_version) >= spack.version.Version("0.17"):
+    if spack.version.Version(spack_version) >= spack.version.Version("0.17"):
         depends_on("kokkos-kernels ~shared", when="+kokkos-kernels")
 
     for _flag in list(CudaPackage.cuda_arch_values):