Help: Review Aruna's mallard-help docs

I checked over Aruna's writing for technical and grammatical
correctness. The following files were reviewed:

git log --pretty="%H" --author="Aruna" | while read commit_hash; \
do git show --oneline --name-only $commit_hash | tail -n+2; \
done | sort | uniq
help: Fix style, some minor updates.