recurlests: Fix header file generation

src/recurlests/recurlests.py

@@ -86,7 +86,7 @@ class Recurlests(object):
         headers = {}
       with open(request_header_file, 'w') as fh:
         for header, value in headers.items():
-          fh.write('%s: %s' % (header, value))
+          fh.write('%s: %s\n' % (header, value))
       command_list.extend(['--header', '@%s' % (request_header_file,)])
       if auth is not None:
         command_list.extend(['--user', '%s:%s' % auth])