t/re/re_tests: Clarify comments

Author: khwilliamson

t/re/re_tests

@@ -1,11 +1,13 @@
-# This stops me getting screenfulls of syntax errors every time I accidentally
-# run this file via a shell glob.  The full format of this file is given
-# in regexp.t
+# The full format of this file is given in regexp.t
+#
 # Prior to the implementation of autoloading of \N{}, tests that used \N{name}
 # could not go in this file, and were farmed out to other .t's, where they
 # remain
 #
 # pat	string	y/n/etc	expr	expected-expr	skip-reason	comment
+#
+# This __END__ stops me getting screenfulls of syntax errors every time I
+# accidentally run this file via a shell glob.
 __END__
 abc	abc	y	$&	abc
 abc	abc	y	$-[0]	0