[GitHub] cordova-docs pull request #722: Update index.md

GitHub user heymartinadams opened a pull request: https://github.com/apache/cordova-docs/pull/722 Update index.md Duplicate entry of `--`, or missing additional parameter, as the case may be. ### Platforms affected Docs ### What does this PR do

[GitHub] cordova-docs issue #722: Update index.md

Github user heymartinadams commented on the issue: https://github.com/apache/cordova-docs/pull/722 It wasn’t clear to me from the docs that the empty `--` also had a purpose. Terminal earlier threw an error with it, so I thought that was the cause, but somehow now it doesn’t