Fix mistakenly tampered fixture file (#27070).

git-svn-id: http://svn.redmine.org/redmine/trunk@17305 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/fixtures/mail_handler/ticket_on_given_project.eml

@@ -38,7 +38,7 @@ Assigned to: John Smith
 fixed version: alpha
 estimated hours: 2.5
 done ratio: 30
-parent issue: 1
+parent issue: 4
 
 --- This line starts with a delimiter and should not be stripped