Cargo Features

[dependencies]
ruby-math = { version = "0.2.2", default-features = false, features = ["debug-ruby-assert", "ruby-assert"] }
default = ruby-assert

The ruby-assert feature is set by default whenever ruby-math is added without default-features = false somewhere in the dependency tree.

debug-ruby-assert
ruby-assert default

ruby-math has 3 features without comments.