The output of rustdoc includes resources licensed under the SIL Open Font License, the MIT license, and the Apache License 2.0. All of these licenses permit redistribution provided that the license text is also redistributed. Previously this was not the case, making rustdoc output unsuitable for distribution by default. This resolves that problem by including the license texts in rustdoc output. See also: https://users.rust-lang.org/t/licensing-rustdoc-output/2880