TabAndSpace.DoubleSpace incorrectly detects within the line

The documentation for this sniff clearly states the following:

Check for any line starting with 2 spaces

However, the sniff will incorrectly trigger on line 2 in this example:

	private array $bufferRequests = [];
	private bool $inBuffer        = false;

The first 2 characters of both lines are tab. The failure of this sniff is that it is checking the entire contents of the line, looking for double space. This is not what the docs say this sniff does. Furthermore, as currently implemented, this behavior conflicts with Generic.Formatting.MultipleStatementAlignment which says that multiple assignment lines should be aligned, as the example above shows.

Please fix this sniff to correctly, and only, search the beginning of the line for violation.

Start with the implementation of the TabAndSpace.DoubleSpace sniff and its documentation, then reproduce the reported two-line example. Done means only lines beginning with two spaces are flagged, while spaces used for alignment later in a line are ignored.