Update lib/chef/sugar/shell.rb

Signed-off-by: Tim Smith <tsmith@chef.io>
Co-authored-by: pete higgins <pete@peterhiggins.org>

lib/chef/sugar/shell.rb

@@ -131,7 +131,7 @@ class Chef
     end
 
     module DSL
-      # this helpers have been moved to core chef
+      # this helper has been moved to core chef
       if !defined?(Chef::VERSION) || Gem::Requirement.new("< 16.0.257").satisfied_by?(Gem::Version.new(Chef::VERSION))
         # @see Chef::Sugar::Shell#which
         def which(cmd); Chef::Sugar::Shell.which(cmd); end