asciidoctor.adoc in asciidoctor-2.0.8

- old
+ new

@@ -1,9 +1,10 @@
 = asciidoctor(1)
 Dan Allen; Sarah White; Ryan Waldron
 :doctype: manpage
+:release-version: 2.0.8
 :man manual: Asciidoctor Manual
-:man source: Asciidoctor 2.0.7
+:man source: Asciidoctor {release-version}
 :page-layout: base
 
 == NAME
 
 asciidoctor - converts AsciiDoc source files to HTML, DocBook, and other formats