[checkfs] add examples to checkfs help / default output

[jstressman]

I found myself wishing checkfs had some examples in the help/default output to give me an idea exactly what it wanted for the given parameters, so I wrote a little patch to give 2 examples. One for each of the 2 ways you can specify which device or volume you wish to check.

These are based on the code from hrev47509

The original output looks like this;

Usage: checkfs <options> <device|volume name>
 
Options:
  -h, --help        - print this help text
  -c, --check-only  - do not make any changes to the file system

I added 2 examples below that to show what we're looking for...

Usage: checkfs <options> <device|volume name>
 
Options:
  -h, --help        - print this help text
  -c, --check-only  - do not make any changes to the file system

Examples:
  checkfs -c /Haiku
  checkfs /dev/disk/ata/0/master/raw

I'm attaching the patch.

[jstressman]

patch to add 2 examples to the help output for checkfs

[jstressman]

Actually I'm going to make an additional change (tab aligning the option descriptions) and then submit a proper patch following the guidelines as per https://dev.haiku-os.org/wiki/SubmittingPatches

[jstressman]

proper git patch for checkfs changes to add examples to help output.

[pulkomandy]

Applied in hrev54147, thanks and sorry for the large delay...