We had previously disabled automatic style verification (via Checkstyle) on the spaces immediately within the parenthesis on method invocations, as we had hit a but in Checktyle:

• https://github.com/checkstyle/checkstyle/issues/3048#issuecomment-249134334

This checkstyle issue was resolved, so we can upgrade to latest version (8.8 at time of writing) and re-enable the checks.