Non-grouping regex for ignore

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Non-grouping regex for ignore

Suggested by Mark Williamson

manifest hash: dfd4686e7ac9f96e79da600edf299ed64213e05d
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mercurial/hg.py

@@ -507,7 +507,7 b' class localrepository:'
                         bigpat.append(util.pconvert(pat[:-1]))
             except IOError: pass
             if bigpat:
-                s = "(%s)" % (")|(".join(bigpat))
+                s = "(?:%s)" % (")|(?:".join(bigpat))
                 r = re.compile(s)
                 self.ignorefunc = r.search
             else: