Adds a test for Lintpref and two test files. Also makes some adjustments to `lintpref.yml` to improve support file loading.
Differential Revision: https://phabricator.services.mozilla.com/D49674
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extra : moz-landing-system : lando
Adds the filepaths of more pref files to Lintpref as well as to its TaskCluster entry. All of the pref files added are noted in bug 1585421.
Differential Revision: https://phabricator.services.mozilla.com/D49363
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extra : moz-landing-system : lando
Rather than statically loading the path to `all.js`, Lintpref should look at any file paths in `lintpref.yml`. Also added the `path` field to each error to accommodate multiple files, and a few other code tidiness cleanups.
Differential Revision: https://phabricator.services.mozilla.com/D48626
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extra : moz-landing-system : lando
Linter that checks for duplicates between StaticPrefList.yaml and all.js. Also a starting point for other prefs linting tasks.
Differential Revision: https://phabricator.services.mozilla.com/D42340
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extra : moz-landing-system : lando
Kristen Wright