Some of these changes are cosmetic (repeatedly calling klog.V instead of
reusing the result), others address real issues:
- Logging a message only above a certain verbosity threshold without
recording that verbosity level (if klog.V().Enabled() { klog.Info... }):
this matters when using a logging backend which records the verbosity
level.
- Passing a format string with parameters to a logging function that
doesn't do string formatting.
All of these locations where found by the enhanced logcheck tool from
https://github.com/kubernetes/klog/pull/297.
In some cases it reports false positives, but those can be suppressed with
source code comments.
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