parameters: (_config_vars, cv, newvalue)
docstring: Save modified and original unmodified value of configuration var
docstring_summary: Save modified and original unmodified value of configuration var
docstring_tokens: Save modified and original unmodified value of configuration var
function: def _save_modified_value(_config_vars, cv, newvalue):
      """Save modified and original unmodified value of configuration var"""
  
      oldvalue = _config_vars.get(cv, '')
      if (oldvalue != newvalue) and (_INITPRE + cv not in _config_vars):
          _config_vars[_INITPRE + cv] = oldvalue
      _config_vars[cv] = newvalue
function_tokens: def _save_modified_value ( _config_vars , cv , newvalue ) : oldvalue = _config_vars . get ( cv , '' ) if ( oldvalue != newvalue ) and ( _INITPRE + cv not in _config_vars ) : _config_vars [ _INITPRE + cv ] = oldvalue _config_vars [ cv ] = newvalue