trim trailing whitespaces

Author: Rilson Nascimento

pkg/private/tar/build_tar.py

@@ -108,7 +108,7 @@ def add_file(self, f, destfile, mode=None, ids=None, names=None):
     # Otherwise; if mode is unspecified, derive the mode from the file's mode.
     if self.preserve_mode is True:
       mode = stat.S_IMODE(os.stat(f).st_mode)
-    elif mode is None: 
+    elif mode is None:
         mode = 0o755 if os.access(f, os.X_OK) else 0o644
     if ids is None:
       ids = (0, 0)

tests/tar/pkg_tar_test.py

@@ -316,13 +316,13 @@ def test_preserve_mode(self):
       expected_mode = [
         ('test-tar-preserve_mode-False.tar', "0o555"), # chmod 555 = r-x r-x r-x
         ('test-tar-preserve_mode-True.tar', "0o644"),  # chmod 644 = rw- r-- r--
-      ]      
+      ]
     for file_name, expected_mode in expected_mode:
       file_path = runfiles.Create().Rlocation('rules_pkg/tests/tar/' + file_name)
       with tarfile.open(file_path, 'r') as f:
         for member in f.getmembers():
           self.assertEqual(member.name, "hello.txt", "unexpected file name for " + file_name)
-          self.assertEqual(member.mode, int(expected_mode, 0), 'file mode not preserved for ' + file_name)        
+          self.assertEqual(member.mode, int(expected_mode, 0), 'file mode not preserved for ' + file_name)
 
 if __name__ == '__main__':
   unittest.main()