bump minimum required Ruby version to 2.5 (PR #4341)

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        ruby: [jruby-9.3.4.0, '2.3', '2.7', '3.0', '3.1']
+        ruby: [jruby-9.3.7.0, '2.5', '2.7', '3.0', '3.1']
         asciimath-version: [~]
         pygments-version: ['~> 2.0']
         rouge-version: [~]
@@ -45,13 +45,13 @@ jobs:
         - os: macos-latest
           ruby: '3.1'
         - os: ubuntu-latest
-          ruby: '2.3'
+          ruby: '2.5'
           asciimath-version: '~> 1.0.0'
         - os: ubuntu-latest
-          ruby: '2.3'
+          ruby: '2.5'
           pygments-version: '~> 1.2.0'
         - os: ubuntu-latest
-          ruby: '2.3'
+          ruby: '2.5'
           rouge-version: '~> 2.0.0'
         - os: ubuntu-latest
           ruby: '3.1'

CHANGELOG.adoc

@@ -40,6 +40,7 @@ Compliance::
   * Don't promote level-0 special section at start of document to document title (#4151)
   * Disallow the use of dot (`.`) in the name of a named element attribute (#4147)
   * Disallow the use of the left square bracket in an attribute list on formatted text (#4306)
+  * Drop support for Ruby < 2.5
 
 Improvements::
 

README.adoc

@@ -128,8 +128,8 @@ If you're using AsciiDoc.py, see {url-docs}/asciidoctor/latest/migrate/asciidoc-
 
 Asciidoctor works on Linux, macOS and Windows and requires one of the following implementations of {url-ruby}[Ruby]:
 
-* CRuby (aka MRI) 2.3 - 3.0
-* JRuby 9.1 - 9.2
+* CRuby (aka MRI) 2.5 - 3.1
+* JRuby 9.1 - 9.3
 * TruffleRuby (GraalVM)
 
 [CAUTION]

asciidoctor.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
   s.homepage = 'https://asciidoctor.org'
   s.license = 'MIT'
   # NOTE required ruby version is informational only; it's not enforced since it can't be overridden and can cause builds to break
-  #s.required_ruby_version = '>= 2.3.0'
+  #s.required_ruby_version = '>= 2.5.0'
   s.metadata = {
     'bug_tracker_uri' => 'https://github.com/asciidoctor/asciidoctor/issues',
     'changelog_uri' => 'https://github.com/asciidoctor/asciidoctor/blob/HEAD/CHANGELOG.adoc',

docs/modules/install/pages/supported-platforms.adoc

@@ -15,7 +15,7 @@ Asciidoctor requires one of the following implementations of {url-ruby}[Ruby^].
 |Supported Runtime |Supported Versions
 
 |Ruby
-|≥ 2.3
+|≥ 2.5
 
 |JRuby
 |≥ 9.1

test/helpers_test.rb

@@ -129,7 +129,7 @@
       expected_cause_message = %r/^(?:no such file to load|cannot load such file) -- does-not-exist$/
       assert_equal expected_message, ex.message
       assert_match expected_cause_message, ex.cause.message
-      if (ex.respond_to? :full_message) && !jruby?
+      if (ex.respond_to? :full_message) && !jruby? && (Gem::Version.new RUBY_VERSION) >= (Gem::Version.new '2.7.0')
         assert_match %r/helpers\.rb.*in.*require_library/, ex.full_message
         assert_match %r/(?:no such file to load|cannot load such file) -- does-not-exist/, ex.full_message
       else