Converting the argument list to a string with ' '.join causes
the shell interpreter to misparse spaces in property values.
Since the zfs command does not need shell anywhere, using
a list instead of a string works just as well with run_command. 

Fixes #3545.

Current property parser breaks when values contain spaces. Since
zfs get -H returns tab separated lines,  it is better to explicitly
split on tabs than on whitespace.

  Migrated all examples: in DOCUMENTATION=''' string to standalone EXAMPLES=''' string
  Added deprecation warning to moduledev.rst and remove deprecated example from it
  Fixed up a few typos and uppercased some acronyms.
  add consistency to how EXAMPLES are formatted