Revert "allow empty-quotes"

This reverts commit 4f2f678aff8d7dfcac96c47cf7eb480a5707ddaf.

lib/gitlab/email/reply_parser.rb

@@ -18,6 +18,10 @@ module Gitlab
         # not using /\s+$/ here because that deletes empty lines
         body = body.gsub(/[ \t]$/, '')
 
+        # TODO [jneen]: do we want to allow empty-quoting? (replies only containing a blockquote)
+        # EmailReplyTrimmer allows this as a special case, so we detect it manually here.
+        return "" if body.lines.all? { |l| l.strip.empty? || l.start_with?('>') }
+
         body.force_encoding(encoding).encode("UTF-8")
       end
 

spec/lib/gitlab/email/reply_parser_spec.rb

@@ -15,23 +15,8 @@ describe Gitlab::Email::ReplyParser, lib: true do
       expect(test_parse_body("asdf" * 30)).to eq("")
     end
 
-    it "returns the quote for an empty-quoted comment" do
-      expect(test_parse_body(fixture_file("emails/empty_quote.eml")))
-        .to eq(<<-BODY.strip_heredoc.chomp)
-         >
-         >
-         >
-         > eviltrout posted in 'Adventure Time Sux' on Discourse Meta:
-         >
-         > ---
-         > hey guys everyone knows adventure time sucks!
-         >
-         > ---
-         > Please visit this link to respond: http://localhost:3000/t/adventure-time-sux/1234/3
-         >
-         > To unsubscribe from these emails, visit your [user preferences](http://localhost:3000/user_preferences).
-         >
-       BODY
+    it "returns an empty string if there is no reply content" do
+      expect(test_parse_body(fixture_file("emails/no_content_reply.eml"))).to eq("")
     end
 
     it "properly renders plaintext-only email" do