Update dangerfile for 2018 #trivial (TextureGroup#746)

* Update the dangerfile

* Make a trivial change to test new dangerfile

* Try out the new value with another trivial change

Dangerfile

@@ -52,7 +52,11 @@ def check_file_header(files_to_check, licenses)
       correct_license = false
       licenses.each do |license|
         license_header = full_license(license, filename)
-        if data.start_with?(license_header)
+        # Hack for https://github.com/TextureGroup/Texture/issues/745
+        # If it's already a "modified-post-Texture" file, leave it with it original copyright year.
+        if data.include "Modifications to this file made after 4/13/2017"
+          correct_license = true
+        elsif data.start_with?(license_header)
           correct_license = true
         end
       end
@@ -87,7 +91,7 @@ modified_source_license_header = <<-HEREDOC
 //  LICENSE file in the /ASDK-Licenses directory of this source tree. An additional
 //  grant of patent rights can be found in the PATENTS file in the same directory.
 //
-//  Modifications to this file made after 4/13/2017 are: Copyright (c) 2017-present,
+//  Modifications to this file made after 4/13/2017 are: Copyright (c) through the present,
 //  Pinterest, Inc.  Licensed under the Apache License, Version 2.0 (the "License");
 //  you may not use this file except in compliance with the License.
 //  You may obtain a copy of the License at