welcome.py: syntax error

Zoran@Zoran-PC  ~/Documents/GitHub/core (master)
$ python pwb.py welcome -help -lang:sr
Traceback (most recent call last):
  File "pwb.py", line 263, in <module>
    if not main():
  File "pwb.py", line 256, in main
    run_python_file(filename, [filename] + args, argvu, file_package)
  File "pwb.py", line 120, in run_python_file
    exec(compile(source, filename, "exec", dont_inherit=True),
  File ".\scripts\welcome.py", line 336
    'zh': u'\n*{{User|%s}} ' + timeselected,
       ^
SyntaxError: invalid syntax
CRITICAL: Closing network session.
<class 'SyntaxError'>