[CI:DOCS] tweak a couple of flag descriptions in help output #12180
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What this PR does / why we need it:
Descriptions of flags don't need to start with whitespace of their own.
How to verify it
Run
podman pull --help
and observe the alignment of the columns.Which issue(s) this PR fixes:
None
Special notes for your reviewer:
Capitalization consistency is probably a lost cause, since we import part of our CLI descriptions wholesale from buildah.