protected function mergeConcatenatedStrings()
	{
		if ($this->tokens[$this->i - 1][0]    !== T_CONSTANT_ENCAPSED_STRING
		 || $this->tokens[$this->i + 1][0]    !== T_CONSTANT_ENCAPSED_STRING
		 || $this->tokens[$this->i - 1][1][0] !== $this->tokens[$this->i + 1][1][0])
		{
			return false;
		}

		// Merge both strings into the right string
		$this->tokens[$this->i + 1][1] = substr($this->tokens[$this->i - 1][1], 0, -1)
		                               . substr($this->tokens[$this->i + 1][1], 1);

		// Unset the tokens that have been optimized away
		unset($this->tokens[$this->i - 1]);
		unset($this->tokens[$this->i]);

		// Advance the cursor
		++$this->i;

		return true;
	}