Bug report: two broken tests if default output configured to JSON #2305

Description

If you configure default output to JSON, you will have two broken tests.

Steps to reproduce

• m365 cli config set -k output -v json
• npm test

Expected result

No broken tests

Actual result

Two broken tests in Cli.ts:

1. replaces option value with the content of the specified file when value starts with @ and the specified file exists
2. leaves the original value if the file specified in @ value doesn't exist

Environment

Latest