Add title-separator

nik9000 · nik9000 · commit 73ae13dd54d8 · 2019-10-17T15:51:54.000-04:00
It prevents `The Definitive Guide` from becoming the subtitle in
Asciidoctor.
diff --git a/book.asciidoc b/book.asciidoc
@@ -1,3 +1,4 @@
+:title-separator: |
 :bookseries: animal
 :es_build:   1
 :ref: https://www.elastic.co/guide/en/elasticsearch/reference/2.4

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
	`1`	`+:title-separator: \|`
`1`	`2`	`:bookseries: animal`
`2`	`3`	`:es_build: 1`
`3`	`4`	`:ref: https://www.elastic.co/guide/en/elasticsearch/reference/2.4`