liturgical law: don't depend on markly

as it prevents the specs from running on Ruby < 2.5
and we're not ditching support of rubies down to 2.0 just for niceties
in the specs
ref #101

Gemfile

@@ -23,5 +23,4 @@ group :test do
   gem 'cucumber', '~> 2.99'
   gem 'simplecov'
   gem 'backports', '~> 3.18'
-  gem 'markly'
 end

Gemfile.lock

@@ -34,7 +34,6 @@ GEM
     i18n (0.6.9)
     jaro_winkler (1.5.4)
     json (2.0.2)
-    markly (0.10.0)
     multi_json (1.12.2)
     multi_test (0.1.2)
     parallel (1.19.2)
@@ -84,7 +83,6 @@ DEPENDENCIES
   backports (~> 3.18)
   cucumber (~> 2.99)
   i18n
-  markly
   rake
   roman-numerals
   rspec

spec/liturgical_law_spec.rb

@@ -1,5 +1,4 @@
 require 'spec_helper'
-require 'markly'
 
 class LiturgicalLawExample
   # make RSpec expectations available for the code example
@@ -29,26 +28,13 @@ def years_with(from: 1970, to: 2300)
   describe path, slow: true do
     document = File.read path
 
-    last_paragraph = ''
-    header_level = 0
-    Markly.parse(document).each do |node|
-      case node.type
-      when :header
-        last_paragraph = node.to_plaintext
-      when :paragraph
-        last_paragraph = node.to_plaintext
-      when :code_block
-        next if node.fence_info != 'ruby'
+    MarkdownDocument.new(document).each_ruby_example do |code, line, last_paragraph|
+      context = last_paragraph[0..50].gsub(/\s+/, ' ')
+      context = context[0..context.rindex(' ')]
 
-        line = node.source_position[:start_line]
-
-        context = last_paragraph[0..50].gsub(/\s+/, ' ')
-        context = context[0..context.rindex(' ')]
-
-        it context do
-          cls = Class.new(LiturgicalLawExample)
-          cls.class_eval(node.string_content, path, line)
-        end
+      it context do
+        cls = Class.new(LiturgicalLawExample)
+        cls.class_eval(code, path, line)
       end
     end
   end

spec/spec_helper.rb

@@ -58,14 +58,21 @@ def initialize(str)
   def each_ruby_example
     example = nil
     line = nil
+    last_paragraph = ''
+    paragraph_beginning = false
     @str.each_line.with_index(1) do |l, i|
       if example.nil?
         if example_beginning?(l)
           example = ''
           line = i + 1
+        elsif l.strip.empty?
+          paragraph_beginning = true
+        elsif paragraph_beginning
+          last_paragraph = l
+          paragraph_beginning = false
         end
       elsif example_end?(l)
-        yield example, line
+        yield example, line, last_paragraph
         example = nil
       else
         example += l