Updated the test case and ran `arc unit`.
NOTE: I have removed the `LINT_SPELLING_PICKY` and `LINT_SPELLING_IMPORTANT` constants and replaced them with `LINT_SPELLING_FULL` and `LINT_SPELLING_PARTIAL`. This was done because it simplifies the implementation considerably and makes customization of the `ArcanistSpellingLinter` simpler, but also because these constants were not widely used in the existing implementation.