Cargo Features

[dependencies]
k9 = { version = "0.12.0", default-features = false, features = ["custom_comparison_formatters", "regex"] }
default = regex

The regex feature is set by default whenever k9 is added without default-features = false somewhere in the dependency tree.

custom_comparison_formatters

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.

regex default

Affects assertions::err_matches_regex, assertions::matches_regex