feature: fixed the word commit as the first word

lib/feature/commit.rb

@@ -14,7 +14,9 @@ module Feature
     def execute
       parts = parse_branch(current_branch)
 
-      comment = argv.reject { |x| x == '-m' }.join(' ')
+      comment = argv.reject { |x| x == '-m' }
+      comment.shift if comment[0] == 'commit'
+      comment = comment.join(' ')
       comment = "#{parts[:feature]}: #{comment}"
 
       git_commit comment