A space is required between 'match' and the opening parenthesis

To ensure consistency with other control structures, a space is now required between the match keyword and the opening parantheses.

// No longer valid:
$result = match($value) {
  5 => 'win',
  default => 'loss',
};

// Newly prescribed style:
$result = match ($value) {
  5 => 'win',
  default => 'loss',
};