knife help text needs a scrub for accuracy and consistent formatting

known issues:

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Sub-Command: client show CLIENT (options)
-a, --attribute [ATTR] Show only one attribute

ATTR is not optional

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Sub-Command: node run_list add [NODE] [ENTRY] (options)
-a, --after [ITEM] Place the ENTRY in the run list after ITEM

ITEM is not optional

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Sub-Command: node show NODE (options)
-a, --attribute [ATTR] Show only one attribute
-r, --run-list Show only the run list

ATTR is not optional

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Sub-Command: role show ROLE (options)
-a, --attribute [ATTR] Show only one attribute

ATTR is not optional

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Sub-Command: search INDEX QUERY (options)
-a, --attribute [ATTR] Show only one attribute
-i, --id-only Show only the ID of matching objects
-R, --rows INT The number of rows to return
-r, --run-list Show only the run list
-o, --sort SORT The order to sort the results in
-b, --start ROW The row to start returning results at

ATTR is not optional

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