wikimedia / mediawiki

		$starty = $snake[1];

		// the middle snake is part of the LCS, store it

		for ( $i = 0; $i < $len; ++$i ) {

			$this->removed[$startx + $i] = $this->added[$starty + $i] = false;

		}

		if ( $d > 1 ) {

			return $len

			 * above, now we need to save all the lines before the difference.

			 */

			$max = min( $startx - $bottoml1, $starty - $bottoml2 );

			for ( $i = 0; $i < $max; ++$i ) {

				$this->removed[$bottoml1 + $i] =

					$this->added[$bottoml2 + $i] = false;

			}

			return $max + $len;

		}