hgweb: fix duplication for some search queries

Given that N is maximum revision number in a repo, than if a revision with
number N-100n or N-100n+1 (for any integer n) is found with a hgweb search,
this revision is duplicated in search results.

mercurial/hgweb/webcommands.py

@@ -119,7 +119,7 b' def _search(web, req, tmpl):'
             cl = web.repo.changelog
             for i in xrange(len(web.repo) - 1, 0, -100):
                 l = []
-                for j in cl.revs(max(0, i - 100), i + 1):
+                for j in cl.revs(max(0, i - 99), i):
                     ctx = web.repo[j]
                     l.append(ctx)
                 l.reverse()