[SYCL][Doc] Minor formatting changes (#10402)

Author: bader

sycl/doc/developer/ContributeToDPCPP.md

@@ -36,12 +36,14 @@ commit message title. To a reasonable extent, additional tags can be used
 to signify the component changed, e.g.: `[PI]`, `[CUDA]`, `[Doc]`.
 
 ## Using \<iostream\> 
-According to [LLVM Coding Standards](https://llvm.org/docs/CodingStandards.html#include-iostream-is-forbidden),
+
+According to 
+[LLVM Coding Standards](https://llvm.org/docs/CodingStandards.html#include-iostream-is-forbidden),
 the use `#include <iostream>` is forbidden in library files. Instead, the
 sycl/detail/iostream_proxy.hpp header offers the functionality of <iostream>
 without its static constructor.
-This header should be used in place of <iostream> in DPC++ headers 
-and runtime library files.
+This header should be used in place of <iostream> in DPC++ headers and runtime
+library files.
 
 ## Tests development