More informative [counter(s)] in docs

[ghost]

The current format for counters (for example in vh execution delete) is not all that clear.

It seems to me the documentation would benefit from extending the standard to be slightly more expressive. For example using something similar to microsoft t-sql documentation changing

vh execution delete [OPTIONS] [COUNTERS]...

to

vh execution [OPTIONS] [COUNTERS <1 2 ... x> || <1-x>]

or simply [COUNTERS ...] rather than [COUNTERS]...
This makes it clear that the ... is part of counters and not other (possibly undocumented) arguments.