tests: fix broken tests.

app/logical/alias_and_implication_importer.rb

@@ -24,7 +24,7 @@ class AliasAndImplicationImporter
   end
 
   def self.tokenize(text)
-    text.split(/\r\n|\r|\n/).map do |line|
+    text.split(/\r\n|\r|\n/).reject(&:blank?).map do |line|
       line = line.gsub(/[[:space:]]+/, " ").strip
 
       if line =~ /^(?:create alias|aliasing|alias) (\S+) -> (\S+)$/i

test/unit/dmail_test.rb

@@ -206,7 +206,7 @@ class DmailTest < ActiveSupport::TestCase
       should "fail gracefully if recipient doesn't exist" do
         assert_nothing_raised do
           dmail = Dmail.create_automated(to_name: "this_name_does_not_exist", title: "test", body: "test")
-          assert_equal(["can't be blank"], dmail.errors[:to_id])
+          assert_equal(["must exist"], dmail.errors[:to])
         end
       end
     end