Update features.md

Just a very minor typo

(that said: these docs don't actually explain what a Feature group is before using the term, but that's for another issue)
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Lars Francke 2020-11-12 12:22:01 +01:00 committed by GitHub
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@ -76,7 +76,7 @@ The usage of features is subject to a few rules:
individual features.
* Feature groups are not allowed to cyclically depend on one another.
* Dev-dependencies cannot be optional.
* Features groups can only reference optional dependencies.
* Feature groups can only reference optional dependencies.
* When a feature is selected, Cargo will call `rustc` with `--cfg
feature="${feature_name}"`. If a feature group is included, it and all of its
individual features will be included. This can be tested in code via