EX-9136 lipe: improve attributes wording in report

EX-9136 lipe: improve attributes wording in report

Print "/" for root directory instead of "".

Improve wording of attributes descriptions in the report.

Change LS3_STATS_TYPE_EQUAL_OVERHEAD to have a 1-block margin
for the "equal" size.  Remove "overhead" from field description.

Remove extra spaces before tabs throughout file.

Test-Parameters: trivial testlist=sanity-lipe-find3,sanity-lipe-scan3
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Ieabde4da50e1c24887789196c6c9a14a57fc9d4f
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/54805
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Vitaliy Kuznetsov <vkuznetsov@ddn.com>