book/en: fix markdown syntax error (#121)

Fixes #120
This commit is contained in:
Rayan
2020-08-28 23:08:48 +08:00
committed by GitHub
parent 32bdf85ebd
commit a3f9aaa394

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@@ -23,7 +23,7 @@ traditional C++ treats `NULL` and `0` as the same thing,
depending on how the compiler defines NULL,
and some compilers define NULL as `((void*)0)` Some will define it directly as `0`.
C++ ** does not allow ** to implicitly convert `void *` to other types.
C++ **does not allow** to implicitly convert `void *` to other types.
But if the compiler tries to define `NULL` as `((void*)0)`, then in the following code:
```cpp