Fix i18n directory not resolving properly when parentheses are used

[ShayPunter]

Fixes #66

It would appear that the issue does not relate to the use of spaces, but rather special characters. This also seems to only effect parentheses, and no other special characters as tested (tested with the following: <> [] {} -- == ** ^^).

How to test

1. Clone webdev-infra and checkout this branch '77_i18n_util_fails_if_run_from_path_with_spaces'
2. Create a local folder which contains parentheses in (e.g. /Shay/programming/Shay (test)/)
3. Clone developer.chrome.com or web.dev to the folder
4. Setup a symlink to the appropriate place
5. run 'npm ci'
6. run 'npm run dev'
7. successful build should happen

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