Merge pull request MicrosoftDocs#2056 from KomarDL/patch-1

Fix push_back prototypes

Author: TylerMSFT

docs/standard-library/list-class.md

@@ -1589,7 +1589,8 @@ After deleting the element at the beginning of the list, the first element is: 2
 Adds an element to the end of a list.
 
 ```cpp
-void push_back(void push_back(Type&& val);
+void push_back(const Type& val);
+void push_back(Type&& val);
 ```
 
 ### Parameters