1 files changed, 4 insertions, 3 deletions
diff --git a/ruby/step3_env.rb b/ruby/step3_env.rb
index 97be81d..9d1c373 100644
--- a/ruby/step3_env.rb
+++ b/ruby/step3_env.rb
@@ -31,12 +31,13 @@ def EVAL(ast, env)
     # apply list
     a0,a1,a2,a3 = ast
     case a0
-    when :"def!"
+    when :def!
         return env.set(a1, EVAL(a2, env))
     when :"let*"
         let_env = Env.new(env)
-        
-        a1.each_slice(2) {|a,e| let_env.set(a, EVAL(e, let_env))}
+        a1.each_slice(2) do |a,e|
+            let_env.set(a, EVAL(e, let_env))
+        end
         return EVAL(a2, let_env)
     else
         el = eval_ast(ast, env)