"_doc" is correct, not "doc" (#38076)

cawoodm · mayya-sharipova · commit 93ac8585820f · 2019-01-31T10:17:42.000-05:00
diff --git a/docs/reference/mapping.asciidoc b/docs/reference/mapping.asciidoc
@@ -152,7 +152,7 @@ PUT my_index <1>
 ---------------------------------------
 // CONSOLE
 <1> Create an index called `my_index`.
-<2> Add a mapping type called `doc`.
+<2> Add a mapping type called `_doc`.
 <3> Specify fields or _properties_.
 <4> Specify the data `type` and mapping for each field.
 
