[FYI] {maint} help: fix a typo in the list of warning categories

[Stefano Lattarini]

* lib/Automake/ChannelDefs.pm (usage): s/none'/none/.

Signed-off-by: Stefano Lattarini <address@hidden>
---
 lib/Automake/ChannelDefs.pm |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Automake/ChannelDefs.pm b/lib/Automake/ChannelDefs.pm
index 524b8f5..02ce849 100644
--- a/lib/Automake/ChannelDefs.pm
+++ b/lib/Automake/ChannelDefs.pm
@@ -194,7 +194,7 @@ Warning categories include:
   unsupported        unsupported or incomplete features (default)
   all                all the warnings
   no-CATEGORY        turn off warnings in CATEGORY
-  none'              turn off all the warnings
+  none               turn off all the warnings
   error              treat warnings as errors
 EOF
 }
-- 
1.7.9.5