Deny warnings in doc tests
This magical attribute is grossly underdocumented, but it works. And it's literally the only thing that makes this work the way I want it to.
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// Deny warnings inside doc tests / examples
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#![doc(test(attr(deny(warnings))))]
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#[cfg_attr(test, macro_use)]
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extern crate hlist_macro;
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@ -436,6 +436,7 @@ impl<'lua> Table<'lua> {
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///
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/// for pair in globals.pairs::<Value, Value>() {
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/// let (key, value) = pair?;
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/// # let _ = (key, value); // used
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/// // ...
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/// }
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/// # Ok(())
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