remove unnecessary quotes in value of subs attribute

ace5f278 · Dan Allen · 74c6dec0 · ace5f278
Commit ace5f278 authored Dec 07, 2020 by Dan Allen
--- a/modules/verbatim/examples/listing.adoc
+++ b/modules/verbatim/examples/listing.adoc
@@ -39,7 +39,7 @@ DEPENDENCIES
 // tag::subs[]
 :release-version: pass:a[{release-version}]

-[source,xml,subs="attributes+"]
+[source,xml,subs=attributes+]
 ----
 <dependency>
  <groupId>org.asciidoctor</groupId>
@@ -51,7 +51,7 @@ DEPENDENCIES

 // in qr
 // tag::subs-out[]
-[source,xml,subs="attributes+"]
+[source,xml,subs=attributes+]
 ----
 <dependency>
  <groupId>org.asciidoctor</groupId>