code: def dist_string(self, val_meters):
          '''return a distance as a string'''
          if self.settings.dist_unit == 'nm':
              return "%.1fnm" % (val_meters * 0.000539957)
          if self.settings.dist_unit == 'miles':
              return "%.1fmiles" % (val_meters * 0.000621371)
          return "%um" % val_meterf dist_string(self, val_meters):
          '''return a distance as a string'''
          if self.settings.dist_unit == 'nm':
              return "%.1fnm" % (val_meters * 0.000539957)
          if self.settings.dist_unit == 'miles':
              return "%.1fmiles" % (val_meters * 0.000621371)
          return "%um" % val_meters
docs: return a distance as a string