Revert "Improve signature detection, so that lines with delimiters in the middle of the line don't get interpreted as beginning of signature."

This reverts commit 1e8a064.

Author: anaulin

lib/email_reply_parser.rb

@@ -133,7 +133,7 @@ def read(text)
 
   private
     EMPTY = "".freeze
-    SIGNATURE = '(?m)^(--|__|\w-$)|(^(\w+\s*){1,3} ym morf tneS$)'
+    SIGNATURE = '(?m)(--|__|\w-$)|(^(\w+\s*){1,3} ym morf tneS$)'
 
     begin
       require 're2'

test/email_reply_parser_test.rb

@@ -167,11 +167,6 @@ def test_pathological_emails
     assert (Time.now - t0) < 1, "Took too long, upgrade to re2 gem."
   end
 
-  def test_doesnt_remove_signature_delimiter_in_mid_line
-    reply = email(:email_sig_delimiter_in_middle_of_line)
-    assert_equal 1, reply.fragments.size
-  end
-
   def email(name)
     body = IO.read EMAIL_FIXTURE_PATH.join("#{name}.txt").to_s
     EmailReplyParser.read body