Update src/content/docs/cpp/language/preprocessor.mdx

Co-authored-by: A. Jiang <de34@live.cn>

Author: momo773510

src/content/docs/cpp/language/preprocessor.mdx

@@ -41,7 +41,7 @@ The preprocessor has the source file translation capabilities:
 
 The following aspects of the preprocessor can be controlled:
 
-*   **<DocLink src="/cpp/preprocessor/impl">implementation-defined</DocLink>** behavior (controlled by directive `#pragma` <Revision since="C++11">and operator `_Pragma` </Revision>). In addition, some compilers support (to varying degrees) the operator `__pragma` as a *non-standard* extension.
+*   **<DocLink src="/cpp/preprocessor/impl">implementation-defined</DocLink>** behavior (controlled by directive `#pragma` <Revision since="C++11">and operator `_Pragma` </Revision>). In addition, some compilers support (to varying degrees) the operator `__pragma` as an extension.
 *   **<DocLink src="/cpp/preprocessor/line">file name and line information</DocLink>** available to the preprocessor (controlled by directive `#line`).
 
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