doc: Use the deprecated macro for chain
-/// [DEPRECATED] `chain!(I->IResult<I,A> ~ I->IResult<I,B> ~ ... I->IResult<I,X> , || { return O } ) => I -> IResult<I, O>`
+/// `chain!(I->IResult<I,A> ~ I->IResult<I,B> ~ ... I->IResult<I,X> , || { return O } ) => I -> IResult<I, O>`
/// chains parsers and assemble the results through a closure
///
/// this parser is deprecated and will be removed in nom 3.0. You can
/// # }
/// ```
#[macro_export]
+#[deprecated(since="0.2.0", note="please use [`do_parse!`](macro.do_parse.html) instead")]
macro_rules! chain (
($i:expr, $($rest:tt)*) => (
{
