Revert "Merge branch 'out_double' of http://gitea.xinje.cc/wangxinyu2/test into out_double"

This reverts commit 8d5b97c9ea9df000afb09341c9054d31ce9b8b6f, reversing
changes made to 9a380c2f9e.

hello.c

@@ -5,7 +5,7 @@ void main()
     printf("hello world\n");
     printf("hello world\n");
     printf("hello world\n");
-    printf("hello world\n");
+    printf("hello\n");
     printf("nihao\n");
     printf("helloworld\n");
     printf("haode\n");