specify utf-8 encoding for compile.vtc

src/tests/compile.vtc

-# -*-mode: vcl; coding: latin-1;-*-
+# -*-mode: vcl; coding: utf-8;-*-
 
-# Those instructions tell emacs to use iso-latin-1 encoding for this
-# source; in particular, it must not be any form of Unicode.
+# Those instructions tell emacs to use utf-8 encoding for this source;
+# you might want to set up your editor similarly.
 
 varnishtest "compilation success and failure"
 # Test data from pcre2 testinput1 and testinput2
@@ -29,7 +29,7 @@ varnish v1 -vcl {
 		new r14 = pcre2.regex("^[^ab\]cde]");
 		new r15 = pcre2.regex("^[^]cde]");
 		new r16 = pcre2.regex("^\");	# hex 0x81
-		new r17 = pcre2.regex("^\");		# hex 0xff
+		new r17 = pcre2.regex("^\");	# hex 0xff
 	}
 } -start