Improve kubectl apply label selector message

[ncapps]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

This change makes the kubectl apply -l label selector flag help message more clear. The label selector query uses the AND operator between each selection criteria.

Which issue(s) this PR fixes:

Fixes kubernetes/kubectl#1150

Special notes for your reviewer:

#107400 cleans up kubectl commands to use this updated helper message.

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Nick Capps (78c094667b14ed42cae15bdc7b3720abbc4b4a66)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @ncapps. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[ncapps]

/sig cli
/triage accepted

[k8s-ci-robot]

@ncapps: The label triage/accepted cannot be applied. Only GitHub organization members can add the label.

In response to this:

/sig cli
/triage accepted

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[lauchokyip]

/ok-to-test

[lauchokyip]

/priority backlog
/triage accepted

[lauchokyip]

Please squash the commits once the PR is ready, thanks!

[lauchokyip]

/lgtm

[lauchokyip]

/assign @eddiezane @soltysh

[eddiezane]

Thanks!

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: eddiezane, lauchokyip, ncapps

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• staging/src/k8s.io/kubectl/OWNERS [eddiezane]

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