[AIRFLOW-6948] Remove ASCII Airflow from version command

[turbaszek]

Before:

root@3f957e731266:/opt/airflow# airflow version
[2020-02-27 16:09:09,092] {settings.py:177} INFO - settings.configure_orm(): Using pool settings. pool_size=5, max_overflow=10, pool_recycle=1800, pid=902
  ____________       _____________
 ____    |__( )_________  __/__  /________      __
____  /| |_  /__  ___/_  /_ __  /_  __ \_ | /| / /
___  ___ |  / _  /   _  __/ _  / / /_/ /_ |/ |/ /
 _/_/  |_/_/  /_/    /_/    /_/  \____/____/|__/  v2.0.0.dev0

after:

root@3f957e731266:/opt/airflow# airflow version
v2.0.0.dev0

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Issue link: AIRFLOW-6948

Make sure to mark the boxes below before creating PR: [x]

• Description above provides context of the change
• Commit message/PR title starts with [AIRFLOW-NNNN]. AIRFLOW-NNNN = JIRA ID^*
• Unit tests coverage for changes (not needed for documentation changes)
• Commits follow "How to write a good git commit message"
• Relevant documentation is updated including usage instructions.
• I will engage committers as explained in Contribution Workflow Example.

^* For document-only changes commit message can start with [AIRFLOW-XXXX].

---

In case of fundamental code change, Airflow Improvement Proposal (AIP) is needed.
In case of a new dependency, check compliance with the ASF 3rd Party License Policy.
In case of backwards incompatible changes please leave a note in UPDATING.md.
Read the Pull Request Guidelines for more information.

[feluelle]

Fine! :)

[feluelle]

Suggested change

	print(f"{airflow.__version__}")
	print(airflow.__version__)

Wait a second.. why are we now still using f string if it is only one variable without any extra string attached to it? 😁

[zhongjiajie]

Good catch！

[turbaszek]

Fixed 😅

[kaxil]

😅

[codecov-io]

Codecov Report

Merging #7572 into master will decrease coverage by 0.34%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #7572      +/-   ##
==========================================
- Coverage   86.82%   86.48%   -0.35%     
==========================================
  Files         896      896              
  Lines       42635    42621      -14     
==========================================
- Hits        37017    36859     -158     
- Misses       5618     5762     +144

Impacted Files	Coverage Δ
airflow/settings.py	93.66% <100%> (ø)	⬆️
airflow/cli/commands/version_command.py	100% <100%> (ø)	⬆️
airflow/kubernetes/volume_mount.py	44.44% <0%> (-55.56%)	⬇️
airflow/kubernetes/volume.py	52.94% <0%> (-47.06%)	⬇️
airflow/kubernetes/pod_launcher.py	47.18% <0%> (-45.08%)	⬇️
airflow/executors/sequential_executor.py	56% <0%> (-44%)	⬇️
...viders/cncf/kubernetes/operators/kubernetes_pod.py	69.69% <0%> (-25.26%)	⬇️
airflow/kubernetes/refresh_config.py	50.98% <0%> (-23.53%)	⬇️
airflow/utils/dag_processing.py	81.94% <0%> (-4.58%)	⬇️
airflow/jobs/scheduler_job.py	89.89% <0%> (-0.43%)	⬇️
... and 5 more

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