add a spec for no-href link parsing

spec/fixtures/emails/html_empty_link.eml

+
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+Date: Wed, 8 Oct 2014 10:47:17 +0530
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+Subject: Re: [Discourse] [Meta] Welcome to techAPJ's Discourse!
+From: Arpit Jalan <arpit@techapj.com>
+To: Discourse <mail+e1c7f2a380e33840aeb654f075490bad@arpitjalan.com>Accept-Language: en-US
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+        boundary="_000_B0DFE1BEB3739743BC9B639D0E6BC8FF217A6341IUMSSGMBX104ads_"
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+--_000_B0DFE1BEB3739743BC9B639D0E6BC8FF217A6341IUMSSGMBX104ads_
+Content-Type: text/html; charset="utf-8"
+
+<a name="_MailEndCompose">no brackets!</a>
+--_000_B0DFE1BEB3739743BC9B639D0E6BC8FF217A6341IUMSSGMBX104ads_--

spec/lib/gitlab/email/reply_parser_spec.rb

@@ -208,5 +208,9 @@ describe Gitlab::Email::ReplyParser, lib: true do
     it "properly renders html-only email from MS Outlook" do
       expect(test_parse_body(fixture_file("emails/outlook_html.eml"))).to eq("Microsoft Outlook 2010")
     end
+
+    it "does not wrap links with no href in unnecessary brackets" do
+      expect(test_parse_body(fixture_file("emails/html_empty_link.eml"))).to eq("no brackets!")
+    end
   end
 end