README.adoc in asciidoctor-doctest-2.0.0.beta.5 vs README.adoc in asciidoctor-doctest-2.0.0.beta.6

@@ -1,10 +1,11 @@
 = Asciidoctor::DocTest
 Jakub Jirutka <https://github.com/jirutka[@jirutka]>
 :source-language: ruby
 // custom
 :gem-name: asciidoctor-doctest
+:gem-version: 2.0.0.beta.6
 :gh-name: asciidoctor/{gem-name}
 :gh-branch: master
 :badge-style: flat
 :doctor-man-uri: http://asciidoctor.org/docs/user-manual
 :rawgit-base: https://cdn.rawgit.com/{gh-name}/master
@@ -12,11 +13,10 @@
 
 image:https://img.shields.io/travis/{gh-name}/{gh-branch}.svg?style={badge-style}[Build Status, link="https://travis-ci.org/{gh-name}"]
 image:https://img.shields.io/codeclimate/coverage/github/{gh-name}.svg?style={badge-style}[Test Coverage, link="https://codeclimate.com/github/{gh-name}"]
 image:https://img.shields.io/codeclimate/github/{gh-name}.svg?style={badge-style}[Code Climate, link="https://codeclimate.com/github/{gh-name}"]
 image:https://inch-ci.org/github/{gh-name}.svg?branch={gh-branch}&style={badge-style}[Inline docs, link="http://inch-ci.org/github/{gh-name}"]
-image:https://img.shields.io/gem/v/{gem-name}.svg?style={badge-style}[Gem Version, link="https://rubygems.org/gems/{gem-name}"]
 image:https://img.shields.io/badge/yard-docs-blue.svg?style={badge-style}[Yard Docs, link="http://www.rubydoc.info/github/{gh-name}/frames"]
 
 DocTest is a tool for end-to-end testing of Asciidoctor _backends_ based on comparing of textual output.
 
 It provides a collection of categorized <<input-examples, input _examples_>> (documents in AsciiDoc syntax) to simplify and systematize writing tests for new backends.
@@ -48,16 +48,16 @@
 [source, sh]
 mkdir -p test/examples/asciidoc
 
 . Add development dependency on `asciidoctor-doctest` to your gemspec:
 +
-[source, ruby]
-s.add_development_dependency 'asciidoctor-doctest', '~> 2.0.0'
+[source, ruby, subs="+attributes"]
+s.add_development_dependency 'asciidoctor-doctest', '= {gem-version}'
 +
 or Gemfile if you’re not distributing the backend as a gem:
 +
-[source, ruby]
-gem 'asciidoctor-doctest', '~> 2.0.0'
+[source, ruby, subs="+attributes"]
+gem 'asciidoctor-doctest', '= {gem-version}'
 +
 and run `bundle install`.
 
 . Create or edit `Rakefile` and configure DocTest tasks:
 +