Merge pull request #1490 from arik-so/rust_beta_doc_fix

Fix rust beta docs for lightning-invoice crate.

diff --combined lightning-invoice/src/lib.rs
index 7025981cc00b4f43f279f3e4de3f5e45b8908ad6,383d8668c01e4990606f0525bc33e2795b7a611b..008d3344b55c5f2becae9cfd553d1c3f3f84dc2a
--- 1/lightning-invoice/src/lib.rs
--- 2/lightning-invoice/src/lib.rs
+++ b/lightning-invoice/src/lib.rs
@@@ -11,7 -11,7 +11,7 @@@
  #![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
  
  //! This crate provides data structures to represent
 -//! [lightning BOLT11](https://github.com/lightningnetwork/lightning-rfc/blob/master/11-payment-encoding.md)
 +//! [lightning BOLT11](https://github.com/lightning/bolts/blob/master/11-payment-encoding.md)
  //! invoices and functions to create, encode and decode these. If you just want to use the standard
  //! en-/decoding functionality this should get you started:
  //!
@@@ -795,18 -795,15 +795,15 @@@ impl SignedRawInvoice 
  /// variant. If no element was found `None` gets returned.
  ///
  /// The following example would extract the first B.
- /// ```
- /// use Enum::*
  ///
  /// enum Enum {
  ///   A(u8),
  ///   B(u16)
  /// }
  ///
- /// let elements = vec![A(1), A(2), B(3), A(4)]
+ /// let elements = vec![Enum::A(1), Enum::A(2), Enum::B(3), Enum::A(4)];
  ///
- /// assert_eq!(find_extract!(elements.iter(), Enum::B(ref x), x), Some(3u16))
- /// ```
+ /// assert_eq!(find_extract!(elements.iter(), Enum::B(x), x), Some(3u16));
  macro_rules! find_extract {
        ($iter:expr, $enm:pat, $enm_var:ident) => {
                find_all_extract!($iter, $enm, $enm_var).next()
@@@ -817,20 -814,18 +814,18 @@@
  /// variant through an iterator.
  ///
  /// The following example would extract all A.
- /// ```
- /// use Enum::*
  ///
  /// enum Enum {
  ///   A(u8),
  ///   B(u16)
  /// }
  ///
- /// let elements = vec![A(1), A(2), B(3), A(4)]
+ /// let elements = vec![Enum::A(1), Enum::A(2), Enum::B(3), Enum::A(4)];
  ///
  /// assert_eq!(
- ///   find_all_extract!(elements.iter(), Enum::A(ref x), x).collect::<Vec<u8>>(),
- ///   vec![1u8, 2u8, 4u8])
- /// ```
+ ///   find_all_extract!(elements.iter(), Enum::A(x), x).collect::<Vec<u8>>(),
+ ///   vec![1u8, 2u8, 4u8]
+ /// );
  macro_rules! find_all_extract {
        ($iter:expr, $enm:pat, $enm_var:ident) => {
                $iter.filter_map(|tf| match *tf {