Wal-Mart to Increase Space by 8 Percent  SAN FRANCISCO (Reuters) - Wal-Mart Stores Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=WMT.N target=/stocks/quickinfo/fullquote"&gt;WMT.N&lt;/A&gt; on  Monday said it plans to increase its store space by 8 percent  in the fiscal year beginning in February, including 240 to 250  more Supercenters and 40 to 45 new discount stores.