xattr-helper: standardize quoting style a bit

diff --git a/bin/xattr-helper.py b/bin/xattr-helper.py
index 83ee32c810bcc2f6ccf49bc7d3fd0e85d105a99a..249ea8732a9bbb66087a84c8b6049dfb046ab542 100755 (executable)
--- a/bin/xattr-helper.py
+++ b/bin/xattr-helper.py
@@ -74,7 +74,7 @@ def quote(s, quote_chars):
                        result.append(octal_quote_byte(s[start:start+1]))
                        pos = start + 1
 
-       return b"".join(result)
+       return b''.join(result)
 
 
 def unquote(s):
@@ -100,7 +100,7 @@ def unquote(s):
                        except AttributeError:
                                result.append(a.tostring())
 
-       return b"".join(result)
+       return b''.join(result)
 
 
 def dump_xattrs(file_in, file_out):
@@ -153,15 +153,15 @@ def main(argv):
        parser = ArgumentParser(description=description, usage=usage)
 
        actions = parser.add_argument_group('Actions')
-       actions.add_argument("--dump",
-               action="store_true",
-               help="Dump the values of all extended "
-                       "attributes associated with null-separated"
-                       " paths read from stdin.")
-       actions.add_argument("--restore",
-               action="store_true",
-               help="Restore extended attributes using"
-                       " a dump read from stdin.")
+       actions.add_argument('--dump',
+               action='store_true',
+               help='Dump the values of all extended '
+                       'attributes associated with null-separated'
+                       ' paths read from stdin.')
+       actions.add_argument('--restore',
+               action='store_true',
+               help='Restore extended attributes using'
+                       ' a dump read from stdin.')
 
        options, args = parser.parse_known_args(argv[1:])
 
@@ -188,11 +188,11 @@ def main(argv):
                restore_xattrs(file_in)
 
        else:
-               parser.error("available actions: --dump, --restore")
+               parser.error('missing action!')
 
        return os.EX_OK
 
 
-if __name__ == "__main__":
+if __name__ == '__main__':
        rval = main(sys.argv[:])
        sys.exit(rval)