Merge pull request #108071 from lanicolas/patch-35

Align with bash style guide

Author: Jak-MS

articles/azure-arc/servers/managed-identity-authentication.md

@@ -85,12 +85,12 @@ The following response is an example that is returned:
 For an Azure Arc-enabled Linux server, using Bash, you invoke the web request to get the token from the local host in the specific port. Specify the following request using the IP address or the environmental variable **IDENTITY_ENDPOINT**. To complete this step, you need an SSH client.
 
 ```bash
-ChallengeTokenPath=$(curl -s -D - -H Metadata:true "http://127.0.0.1:40342/metadata/identity/oauth2/token?api-version=2019-11-01&resource=https%3A%2F%2Fmanagement.azure.com" | grep Www-Authenticate | cut -d "=" -f 2 | tr -d "[:cntrl:]")
-ChallengeToken=$(cat $ChallengeTokenPath)
+CHALLENGE_TOKEN_PATH=$(curl -s -D - -H Metadata:true "http://127.0.0.1:40342/metadata/identity/oauth2/token?api-version=2019-11-01&resource=https%3A%2F%2Fmanagement.azure.com" | grep Www-Authenticate | cut -d "=" -f 2 | tr -d "[:cntrl:]")
+CHALLENGE_TOKEN=$(cat $CHALLENGE_TOKEN_PATH)
 if [ $? -ne 0 ]; then
     echo "Could not retrieve challenge token, double check that this command is run with root privileges."
 else
-    curl -s -H Metadata:true -H "Authorization: Basic $ChallengeToken" "http://127.0.0.1:40342/metadata/identity/oauth2/token?api-version=2019-11-01&resource=https%3A%2F%2Fmanagement.azure.com"
+    curl -s -H Metadata:true -H "Authorization: Basic $CHALLENGE_TOKEN" "http://127.0.0.1:40342/metadata/identity/oauth2/token?api-version=2019-11-01&resource=https%3A%2F%2Fmanagement.azure.com"
 fi
 ```