Formats a Sri Lankan vehicle number plate into clean standardized format.
Vehicle plate in any common spacing.
The plate in standard form, or null if invalid.
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formatVehiclePlate('wp cab 1234'); // 'WP CAB-1234' Copy
formatVehiclePlate('wp cab 1234'); // 'WP CAB-1234'
Formats a Sri Lankan vehicle number plate into clean standardized format.