Merge pull request #1603 from noelleleigh/patch-1

Fix lingering Markdown for git-send-email.io

Author: ben

book/05-distributed-git/sections/contributing.asc

@@ -787,7 +787,7 @@ Result: OK
 
 [TIP]
 ====
-For help on configuring your system and email, more tips and tricks, and a sandbox to send a trial patch via email, go to [git-send-email.io](https://git-send-email.io/).
+For help on configuring your system and email, more tips and tricks, and a sandbox to send a trial patch via email, go to https://git-send-email.io[git-send-email.io^].
 ====
 
 ==== Summary