tweak test/bench's help around filtering & libtest
authorDale Wijnand <dale.wijnand@gmail.com>
Wed, 11 Apr 2018 06:39:13 +0000 (07:39 +0100)
committerDale Wijnand <dale.wijnand@gmail.com>
Wed, 11 Apr 2018 08:56:28 +0000 (09:56 +0100)
commit3830904ce93751550913ea8b46a6099907435c41
treeaf6ade84a7f9695ff6e214cfd0e31843a9f6a142
parentb0d65af158bc2f2e4c1bc4e143a7dcd4b40af0f5
tweak test/bench's help around filtering & libtest

Attempt to bring more clarity about test/bench's filtering arg by
detailing the distinction and integration between cargo's test/bench and
libtest.

Also make sure to mention how to see libtest's help/usage message.

Fixes #5337
src/bin/commands/bench.rs
src/bin/commands/run.rs
src/bin/commands/test.rs