maint: sc_prohibit_fail_0: update a stale comment

* cfg.mk (sc_prohibit_fail_0): Following on from
commit v8.0-79-g71c2f88, update the comment to match.

diff --git a/cfg.mk b/cfg.mk
index 36458a4..ef8a2c8 100644 (file)
--- a/cfg.mk
+++ b/cfg.mk
@@ -263,9 +263,7 @@ sc_prohibit_emacs__indent_tabs_mode__setting:
        halt='use of emacs indent-tabs-mode: setting'                   \
          $(_sc_search_regexp)
 
-# Ensure that each file that contains fail=1 also contains fail=0.
-# Otherwise, setting file=1 in the environment would make tests fail
-# unexpectedly.
+# Ensure that tests don't include a redundant fail=0.
 sc_prohibit_fail_0:
        @prohibit='\<fail=0\>'                                          \
        halt='fail=0 initialization'                                    \