Cargo Features

gitrevset has no features set by default.

[dependencies]
gitrevset = { version = "0.2.0", features = ["testutil"] }
testutil = drawdag, tempfile

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

drawdag testutil?

Enables esl01-drawdag ^0.1

tempfile testutil?