test179: use consistent header line endings

... to make "Hyper mode" work better.
2021-01-08 10:57:48 +01:00 · 2021-01-08 10:57:48 +01:00 · 060658f634
--- a/tests/data/test179
+++ b/tests/data/test179
@ -16,7 +16,7 @@ Server: Microsoft-IIS/4.0
 Date: Tue, 25 Sep 2001 19:37:44 GMT
 Content-Type: text/html
 Connection: close
-Content-Length: 21
+Content-Length: 21
 This server says moo
 </data>