Update initcall.md

Concepts/initcall.md

@@ -7,6 +7,7 @@ Introduction
 --------------------------------------------------------------------------------
 
 As you may understand from the title, this part will cover an interesting and important concept in the Linux kernel which is called - `initcall`. We already saw definitions like these:
+
 就像你从标题所理解的，这部分将涉及Linux内核中有趣且重要的概念，称之为 `initcall`。我们可以看到类似这样的定义：
 
 ```C
@@ -14,6 +15,7 @@ early_param("debug", debug_kernel);
 ```
 
 or
+
 或者
 
 ```C