Merge pull request #5220 from TylerMSFT/github

Fixes #3014

Author: prmerger-automator[bot]

docs/build/reference/description-blocks.md

@@ -156,7 +156,7 @@ In this example, UPDATE is a pseudotarget.
 
 ```makefile
 UPDATE : *.*
-!COPY $** c:\product\release
+COPY $** c:\product\release
 ```
 
 When UPDATE is evaluated, NMAKE copies all files in the current directory to the specified drive and directory.