Remove trailing whitespace from license text

lib/spack/spack/cmd/list.py

@@ -34,4 +34,3 @@ def setup_parser(subparser):
 def list(parser, args):
     # Print all the package names in columns
     colify(packages.all_package_names())
-

lib/spack/spack/util/crypto.py

@@ -102,4 +102,3 @@ def check(self, filename):
         self.sum = checksum(
             self.hash_fun, filename, block_size=self.block_size)
         return self.sum == self.hexdigest
-

lib/spack/spack/util/filesystem.py

@@ -97,5 +97,3 @@ def stem(path):
 def can_access(file_name):
     """True if we have read/write access to the file."""
     return os.access(file_name, os.R_OK|os.W_OK)
-
-