string interpolation (#{foo}) does stringify implicitly; no need to call #to_s

1 files changed, 3 insertions, 3 deletions

diff --git a/mrbgems/mruby-array-ext/mrblib/array.rb b/mrbgems/mruby-array-ext/mrblib/array.rb
index 65ea717d2..9aacfc3dc 100644
--- a/mrbgems/mruby-array-ext/mrblib/array.rb
+++ b/mrbgems/mruby-array-ext/mrblib/array.rb
@@ -20,7 +20,7 @@ class Array
   end
 
   def -(elem)
-    raise TypeError, "can't convert #{elem.class.to_s} into Array" unless elem.class == Array
+    raise TypeError, "can't convert #{elem.class} into Array" unless elem.class == Array
 
     hash = {}
     array = []
@@ -30,14 +30,14 @@ class Array
   end
 
   def |(elem)
-    raise TypeError, "can't convert #{elem.class.to_s} into Array" unless elem.class == Array
+    raise TypeError, "can't convert #{elem.class} into Array" unless elem.class == Array
 
     ary = self + elem
     ary.uniq! or ary
   end
 
   def &(elem)
-    raise TypeError, "can't convert #{elem.class.to_s} into Array" unless elem.class == Array
+    raise TypeError, "can't convert #{elem.class} into Array" unless elem.class == Array
 
     hash = {}
     array = []