Fix #555 - Use a better URL parser

spec/lib/formatter_spec.rb

@@ -17,8 +17,38 @@ RSpec.describe Formatter do
     end
 
     it 'contains a link' do
-      expect(subject).to match('<a rel="nofollow noopener" target="_blank" href="http://google.com"><span class="invisible">http://</span><span class="">google.com</span><span class="invisible"></span></a>')
+      expect(subject).to match('<a href="http://google.com" rel="nofollow noopener" target="_blank"><span class="invisible">http://</span><span class="">google.com</span><span class="invisible"></span></a>')
     end
+
+=begin
+    it 'matches a stand-alone medium URL' do
+      expect(subject.match('https://hackernoon.com/the-power-to-build-communities-a-response-to-mark-zuckerberg-3f2cac9148a4')[0]).to eq 'https://hackernoon.com/the-power-to-build-communities-a-response-to-mark-zuckerberg-3f2cac9148a4'
+    end
+
+    it 'matches a stand-alone google URL' do
+      expect(subject.match('http://google.com')[0]).to eq 'http://google.com'
+    end
+
+    it 'matches a URL without trailing period' do
+      expect(subject.match('http://www.mcmansionhell.com/post/156408871451/50-states-of-mcmansion-hell-scottsdale-arizona. ')[0]).to eq 'http://www.mcmansionhell.com/post/156408871451/50-states-of-mcmansion-hell-scottsdale-arizona'
+    end
+
+    it 'matches a URL without closing paranthesis' do
+      expect(subject.match('(http://google.com/)')[0]).to eq 'http://google.com'
+    end
+
+    it 'matches a URL without exclamation point' do
+      expect(subject.match('http://www.google.com! ')[0]).to eq 'http://www.google.com'
+    end
+
+    it 'matches a URL with a query string' do
+      expect(subject.match('https://www.ruby-toolbox.com/search?utf8=%E2%9C%93&q=autolink')[0]).to eq 'https://www.ruby-toolbox.com/search?utf8=%E2%9C%93&q=autolink'
+    end
+
+    it 'matches a URL with parenthesis in it' do
+      expect(subject.match('https://en.wikipedia.org/wiki/Diaspora_(software)')[0]).to eq 'https://en.wikipedia.org/wiki/Diaspora_(software)'
+    end
+=end
   end
 
   describe '#reformat' do