WUnderground relative humidity shows 2 "%" symbols

[sgauche]

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Home Assistant release (hass --version): 0.27

Python release (python3 --version): 3.4.2

Component/platform: sensor: platform: wunderground

Description of problem: The relative humidity state is "63%" with the unit of measurement also set to "%" so it seems that HA puts 2 % symbols in the view.

Expected: I would expect the state of the relative humidity to be "63" and then unit of measurement to be "%" and only see 1 % symbol in the view.

Problem-relevant configuration.yaml entries and steps to reproduce:

sensor:
  platform: wunderground
  api_key: <redacted>
  monitored_conditions:
    - weather
    - temp_f
    - station_id
    - relative_humidity
customize:
  sensor.pws_relative_humidity:
    icon: mdi:water-percent
    friendly_name: 'Outdoor Humidity'

Traceback (if applicable):

Additional info:

[arsaboo]

This should be fixed in the upcoming release (https://github.com/home-assistant/home-assistant/pull/3018)

[sgauche]

@arsaboo Alright, I should start to search closed issues.