RequireMultiLineCall: Fix when multiline call exactly fits into the line length limit

[maryo]

Fixing reporting error for a multiline call that exactly fits into the line length limit.

$array = array_map(['a loooooooooooooooooong value that exactly fits into the line length limit'], function (): string {
    return 'foo';
});

Here, $lineStart would be $array = array_map(.
Previously, $lineEnd was (['a loooooooooooooooooong value that exactly fits into the line length limit'], function (): string {.
It was including the opening parenthesis ( again, so $lineLength of this line was 121 instead of 120.

[kukulich]

Thanks.