backport of commit d74c497

website/docs/language/resources/provisioners/file.mdx

@@ -47,7 +47,7 @@ resource "aws_instance" "web" {
 }
 ```
 
--> **Note:** When the `file` provisioner is talking to a Windows system over SSH, you must configure OpenSSH to run the commands with `cmd.exe` and not by PowerShell. 
+-> **Note:** When the `file` provisioner communicates with a Windows system over SSH, you must configure OpenSSH to run the commands with `cmd.exe` and not PowerShell. PowerShell causes file parsing errors because it is incompatible with both Unix shells and the Windows command interpreter.
 
 ## Argument Reference