Update watcher.fsx to support nullness #2055
Merged
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I have zero experience on the Ionide codebase, but saw that VSCode was giving nullness warnings on starting FSI e.g.
This PR removes the warnings, but someone should review them to make sure that there hasn't been any semantic change in behaviour.
I also saw one apparently unnecessary transformation from Array to List to Seq which I have removed, for performance purposes.