No more + character in environment variable WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG

[MilesTEG1]

Describe the bug

• character in environment variable WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG isn't present in the mail's object since the 8 January.

To Reproduce
Steps to reproduce the behavior:
Set this environnement variable like this :

      - WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG=[ Watchtower-DS920+ ]

Expected behavior
I expected to have the + character in my object message like this :
[ Watchtower-DS920 ] Watchtower updates on ...

Screenshots

Environment

• Platform = Synology NAS DS920+
• Architecture = amd64 (CPU = Intel Celeron J4125)
• Docker version = 18.09.0-0513
• I use Portainer CE 2.1.1 to create my container

Logs from running watchtower with the --debug option

time="2021-02-06T14:04:43+01:00" level=debug

time="2021-02-06T14:04:44+01:00" level=debug msg="Sleeping for a second to ensure the docker api client has been properly initialized."

time="2021-02-06T14:04:45+01:00" level=debug msg="Retrieving running containers"

time="2021-02-06T14:04:45+01:00" level=debug msg="There are no additional watchtower containers"

time="2021-02-06T14:04:45+01:00" level=debug msg="Watchtower HTTP API skipped."

time="2021-02-06T14:04:45+01:00" level=info msg="Starting Watchtower and scheduling first run: 2021-02-07 06:00:00 +0100 CET"

Additional context
Before the 8 January, the + character was present in my notification subject (see the screenshot). But since, it's not. I didn't change the docker-compose.yml file I'm using, except for the schedule.

Here the docker-compose.yml I'm using :

#
# Doc de Watchtower : https://containrrr.dev/watchtower/
# Dépôt GitHub : https://github.com/containrrr/watchtower/
#
---
version: "2.1"
services:
  watchtower:
    image: containrrr/watchtower:amd64-latest
    container_name: watchtower
    network_mode: bridge
    environment:
      - WATCHTOWER_NOTIFICATIONS=email
      #- WATCHTOWER_NOTIFICATIONS_LEVEL=debug
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_REMOVE_VOLUMES=true
      - WATCHTOWER_DEBUG=true
      - WATCHTOWER_LABEL_ENABLE=true
      - WATCHTOWER_TIMEOUT=30s
      # Utiliser soit SCHEDULE soit INTERVAL (ce dernier en sec)
      # Pour SCHEDULE : https://crontab.guru/#0_9_*_*_*
      # Ajouter un 0 en premier pour les secondes : secondes | minutes | heures | jour du mois | mois | jour de la semaine
      - WATCHTOWER_SCHEDULE=0 0 6 * * *
      #- WATCHTOWER_POLL_INTERVAL=3000
      - TZ=Europe/Paris
      
      #####################################################################
      # Pour les notifications en emails :
      - WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG=[ Watchtower-DS920+ ]
      - WATCHTOWER_NOTIFICATION_EMAIL_FROM=my-Gmail-email
      - WATCHTOWER_NOTIFICATION_EMAIL_TO=my-Gmail-email
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER=smtp.gmail.com
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT=587
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER=my-Gmail-email
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD=apasswordtomyemail
      - WATCHTOWER_NOTIFICATION_EMAIL_DELAY=2
      #####################################################################
    
    labels:
      - "com.centurylinklabs.watchtower.enable=true"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: unless-stopped

[github-actions]

Hi there! 👋🏼 As you're new to this repo, we'd like to suggest that you read our code of conduct as well as our contribution guidelines. Thanks a bunch for opening your first issue! 🙏

[piksel]

That should be fixed in shoutrrr v0.4.1 which will be in the next watchtower release.

[MilesTEG1]

Ho ! Cool :D
I didn't do something wrong 😃

[ghost]

To avoid important communication to get lost in a closed issues no one monitors, I'll go ahead and lock this issue. If you want to continue the discussion, please open a new issue. Thank you! 🙏🏼