free: apply conventions (#1733)

coverage
Starbeamrainbowlabs 2017-12-03 09:36:56 +00:00 committed by GitHub
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@ -8,12 +8,12 @@
- Display memory in Bytes/KB/MB/GB:
`free {{-b/-k/-m/-g}}`
`free -{{b|k|m|g}}`
- Display memory in human readable units:
`free -h`
- Continuous monitor memory (refresh every X seconds):
- Refresh the output every 2 seconds:
`free -s {{X}}`
`free -s {{2}}`