1 files changed, 2 insertions, 2 deletions
diff --git a/rstrip.rb b/rstrip.rb
index b198488..56849d3 100644
--- a/rstrip.rb
+++ b/rstrip.rb
@@ -13,8 +13,8 @@ module Puppet::Parser::Functions
     value = arguments[0]
     klass = value.class
 
-    if not [Array, String].include?(klass)
-      raise(Puppet::ParseError, 'rstrip(): Requires either an ' +
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'rstrip(): Requires either ' +
         'array or string to work with')
     end