lint travis.yml

[n0npax]

improve yaml syntax

[minikube-bot]

Can one of the admins verify this patch?

[k8s-ci-robot]

Hi @n0npax. Thanks for your PR.

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: n0npax
To complete the pull request process, please assign medyagh
You can assign the PR to them by writing /assign @medyagh in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

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Approvers can indicate their approval by writing /approve in a comment
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[codecov-io]

Codecov Report

Merging #5536 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #5536   +/-   ##
=======================================
  Coverage   36.63%   36.63%           
=======================================
  Files         102      102           
  Lines        7346     7346           
=======================================
  Hits         2691     2691           
  Misses       4298     4298           
  Partials      357      357

Impacted Files	Coverage Δ
pkg/minikube/assets/addons.go	36.66% <0%> (ø)	⬆️
cmd/minikube/cmd/config/config.go	10.41% <0%> (ø)	⬆️

[TravisBuddy]

Travis tests have failed

Hey @n0npax,
Please read the following log in order to understand the failure reason.
It'll be awesome if you fix what's wrong and commit the changes.

1st Build

View build log

black ./hack --check

would reformat /home/travis/build/kubernetes/minikube/hack/get_k8s_version.py
would reformat /home/travis/build/kubernetes/minikube/hack/boilerplate/boilerplate.py
would reformat /home/travis/build/kubernetes/minikube/hack/prow/run_tests.py
All done! 💥 💔 💥
3 files would be reformatted.
travis_time:end:03621792:start=1570105127045635427,finish=1570105127687667311,duration=642031884,event=script

TravisBuddy Request Identifier: 88fd2960-e5d8-11e9-82e3-2501c7641175

[TravisBuddy]

Travis tests have failed

Hey @n0npax,
Please read the following log in order to understand the failure reason.
It'll be awesome if you fix what's wrong and commit the changes.

1st Build

View build log

black ./hack --check

would reformat /home/travis/build/kubernetes/minikube/hack/get_k8s_version.py
would reformat /home/travis/build/kubernetes/minikube/hack/boilerplate/boilerplate.py
would reformat /home/travis/build/kubernetes/minikube/hack/prow/run_tests.py
All done! 💥 💔 💥
3 files would be reformatted.
travis_time:end:17b98eaa:start=1570105388726686512,finish=1570105389351010687,duration=624324175,event=script

TravisBuddy Request Identifier: 51d7c570-e5d9-11e9-82e3-2501c7641175

[medyagh]

@n0npax could you please specify the tool you used to lint the yaml file ? It would be nice to add a comment in the yaml file for future editors to make sure they pass a specific yaml format

[n0npax]

Added info about yamllint to file as requested

[medyagh]

Thank you for improving the code readability.