cargo --features takes lists in more ways than space-separated

[mulimoen]

Problem

Might be a nit-picky, but cargo b --help lists --features as taking a space-separated list of features. The normal way to invoke features seems to be to use a comma-separated list (easier as this does not require quoting when invoking). This is however not documented. Is this supported and should the help text be changed?

Steps

1. cargo b --features "feat1 feat2"
2. cargo b --features "feat1,feat2"

Both enable the features feat1 and feat2, using different separators.

Possible Solution(s)

Change the help text in cargo --help for --features to
Space- or comma-separated list of features to activate

Notes

Output of cargo version:
cargo 1.45.0-nightly (40ebd52 2020-06-01)

[ehuss]

It is documented in the man page, just not the built-in help page. Would be happy to accept a PR to update the built-in help!

[giraffate]

I'd like to work on this.