Nothing
Code
add_build_metadata(smvr(1:5), c("foo", "bar.baz", "@foo", ":bar"))
Condition
Error in `add_build_metadata()`:
! `metadata` must match the pattern "^[0-9A-Za-z-]+(?:\\.[0-9A-Za-z-]+)*$".
x Problematic values: "@foo" and ":bar"
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