pkg/util/iptables: use buf.String() instead of string(buf.Bytes())

[TommyStarK]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

When dealing with *bytes.Buffer, use buf.String() instead of string(buf.Bytes())

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

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

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[aojea]

/lgtm
/assign @danwinship

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: a3ab3f7e1abf055486dd2b5527a74b1b1a6d3ceb

[danwinship]

hm... ok... but actually, can you fix the uses in pkg/proxy/ipvs/proxier_test.go and pkg/proxy/util/utils_test.go too?

[TommyStarK]

hm... ok... but actually, can you fix the uses in pkg/proxy/ipvs/proxier_test.go and pkg/proxy/util/utils_test.go too?

sure thing @danwinship, done in 1fcfd1d

[TommyStarK]

/retest-required

[danwinship]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: d464a18ef6b402506b1829a4dc3f64b1ae6aeee4

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: danwinship, TommyStarK

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• pkg/proxy/OWNERS [danwinship]
• pkg/util/iptables/OWNERS [danwinship]

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