a5ccef5 frontend: fix testsuite stderr warnings

1 file Authored by praiskup 3 years ago, Committed by praiskup 3 years ago,
    frontend: fix testsuite stderr warnings
    
    helpers.py:14: SyntaxWarning: "is" with a literal. Did you mean "=="?
      if type is "10min":
    helpers.py:18: SyntaxWarning: "is" with a literal. Did you mean "=="?
      elif type is "30min":
    helpers.py:22: SyntaxWarning: "is" with a literal. Did you mean "=="?
      elif type is "24h":