News180: edits for adamjonas feedback (thanks!)

Author: harding

_posts/en/newsletters/2021-12-22-newsletter.md

@@ -27,7 +27,7 @@ summary], [2019][2019 summary], and [2020][2020 summary].
 After years of discussion, January saw the first [release][bcc21] of a
 Bitcoin Core version supporting [signets][topic signet], following prior
 [support][cl#2816] by C-Lightning and followed by [support][lnd#5025] in
-LND.  Signets are test networks anyone can used to simulate Bitcoin's
+LND.  Signets are test networks anyone can use to simulate Bitcoin's
 main network (mainnet), either as it exists today or how it might exist
 with certain changes (such as the activation of a soft fork consensus
 change).  Most software implementing signets also supports a default
@@ -361,7 +361,7 @@ using presigned transactions, such as LN.  Package relay hopes to solve
 this key safety issue.
 
 An idea originally proposed in 2019 for LN saw renewed life in June.  The
-original *fast forwards* idea described how an LN wallet could receive
+original [fast forwards][ff orig] idea described how an LN wallet could receive
 or relay a payment with fewer network round-trips, reducing network
 bandwidth and payment latency.  The idea was [expanded][ff expanded]
 this year to describe how an LN wallet could receive multiple payments
@@ -666,3 +666,4 @@ FIXME:write conclusion
 [nov cs]: /en/newsletters/2021/11/17/#changes-to-services-and-client-software
 [dec cs]: /en/newsletters/2021/12/15/#changes-to-services-and-client-software
 [mpa ml]: https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-September/019464.html
+[ff orig]: https://lists.linuxfoundation.org/pipermail/lightning-dev/2019-April/001986.html