Case changes should fail
In general, if you have a word, e.g. Microsoft that isn't in the dictionary, check-spelling will flag it (❌).
You can then add Microsoft to expect.txt and check-spelling will be happy (✅).
If you then add microsoft, check-spelling will flag it -- because the proper spelling is Microsoft.
Ideally, check-spelling should report this as ❌, but sometimes if the only change was the case of the word, due to a bug it wouldn't actually fail (❌).
The reason you're adding microsoft is probably because it's a path and paths probably must be in lowercase.
As such, check-spelling will understand if you add microsoft to expect.txt (and will suggest removing Microsoft),
further it will understand that because you've added microsoft, you're also ok with Microsoft, if only because you
might add a general lowercase noun and write it as the first word in an English sentence. This behavior is specific to
English and if/when check-spelling starts trying to support other languages, this feature could go away.
Note: The generated expect update script (in the log, or the next time you get a fail) will properly update Microsoft to microsoft.
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