code cleanup

lib/feature/merge_to.rb

@@ -3,6 +3,17 @@ require_relative './base'
 module Feature
 
   class MergeTo < Feature::Base
+    def valid?
+      [1,2].include? argv.size
+    end
+
+    def help
+      puts
+      puts "USAGE: feature merge [branch]"
+      puts
+      exit
+    end
+
     def execute
       parts = parse_branch(current_branch)
 
@@ -10,8 +21,6 @@ module Feature
         merge_to_branch = argv[1]
       elsif argv.size == 1
         merge_to_branch = parts[:standard]
-      else
-        error "USAGE: feature merge [branch]"
       end
 
       feature_branch  = current_branch