diff -r 1d7d0c07e8f3 -r dd186cb70a64 mercurial/ui.py
--- a/mercurial/ui.py	Thu Dec 01 10:51:45 2005 -0600
+++ b/mercurial/ui.py	Wed Dec 14 20:38:11 2005 -0600
@@ -145,7 +145,7 @@
                   os.environ.get("EDITOR", "vi"))
 
         os.environ["HGUSER"] = self.username()
-        util.system("%s %s" % (editor, name), errprefix=_("edit failed"))
+        util.system("%s \"%s\"" % (editor, name), errprefix=_("edit failed"))
 
         t = open(name).read()
         t = re.sub("(?m)^HG:.*\n", "", t)