Update multiline-secrets.md

The multiline secret is returned as `My\nSecret`, where the `\n` is NOT the newline character, but rather `\` and `n`. This is unexpected, because the documentation says newline, and I as .NET developer where `\n` is commonly used to denote the invisible newline character expected that those are literal newlines.

Author: nohwnd

articles/key-vault/secrets/multiline-secrets.md

@@ -39,12 +39,14 @@ You can then view the stored secret using the Azure CLI [az keyvault secret show
 az keyvault secret show --name "MultilineSecret" --vault-name "<your-unique-keyvault-name>" --query "value"
 ```
 
-The secret will be returned with newlines embedded:
+The secret will be returned with `\n` in place of newline:
 
 ```bash
 "This is\nmy multi-line\nsecret"
 ```
 
+The `\n` above is a `\` and `n` character, not the newline character.
+
 ## Set the secret using Azure Powershell
 
 With Azure PowerShell, you must first read in the file using the [Get-Content](/powershell/module/microsoft.powershell.management/get-content) cmdlet, then convert it to a secure string using [ConvertTo-SecureString](/powershell/module/microsoft.powershell.security/convertto-securestring). 
@@ -66,12 +68,14 @@ You can then view the stored secret using the Azure CLI [az keyvault secret show
 az keyvault secret show --name "MultilineSecret" --vault-name "<your-unique-keyvault-name>" --query "value"
 ```
 
-The secret will be returned with newlines embedded:
+The secret will be returned with `\n` in place of newline:
 
 ```bash
 "This is\nmy multi-line\nsecret"
 ```
 
+The `\n` above is a `\` and `n` character, not the newline character.
+
 ## Next steps
 
 - Read an [Overview of Azure Key Vault](../general/overview.md)