From 62e9ea6b71d7c2cbb7b408f17fba32d355ea43ba Mon Sep 17 00:00:00 2001
From: Divay Prakash <divayprakash3@gmail.com>
Date: Sat, 27 Oct 2018 18:16:06 +0530
Subject: [PATCH] Explain regexp, closes #2197

---
 yaml.html.markdown | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/yaml.html.markdown b/yaml.html.markdown
index ab0f9d55..d51b2147 100644
--- a/yaml.html.markdown
+++ b/yaml.html.markdown
@@ -121,6 +121,10 @@ other_anchor: *anchor_name
 base: &base
   name: Everyone has same name
 
+# The regexp << is called Merge Key Language-Independent Type. It is is used to
+# indicate that all the keys of one or more specified maps should be inserted
+# into the current map.
+
 foo: &foo
   <<: *base
   age: 10