ferris-says
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Use SPDX syntax for license expression
The license is supposed to be an SPDX 2.3 license expression. See https://doc.rust-lang.org/1.75.0/cargo/reference/manifest.html#the-license-and-license-file-fields.
SPDX license expressions support AND and OR operators to combine multiple licenses.
Previously multiple licenses could be separated with a /, but that usage is deprecated.