Fix "horse butt" comment in source code

encoder/csv/enc_csv.c

@@ -41,10 +41,12 @@
  *   (double) quote characters.
  * - Leading and trialing whitespace require fields be quoted.
  *
- * Cheesy, but simple.  The RFC also requires MS-DOS end-of-line, which
- * we only do with the "dos" option.  Strange that we still live in a
- * DOS-friendly world, but then again, we make spaceships based on the
- * horse butts (http://www.astrodigital.org/space/stshorse.html).
+ * Cheesy, but simple.  The RFC also requires MS-DOS end-of-line,
+ * which we only do with the "dos" option.  Strange that we still live
+ * in a DOS-friendly world, but then again, we make spaceships based
+ * on the horse butts (http://www.astrodigital.org/space/stshorse.html
+ * though the "built by English expatriates” bit is rubbish; better to
+ * say the first engines used in America were built by Englishmen.)
  */
 
 #include <string.h>