added lbrace, rbrace, atsign;

--- a/doc-src/railsetup.sty	Thu Jun 29 22:39:09 2000 +0200
+++ b/doc-src/railsetup.sty	Thu Jun 29 22:39:31 2000 +0200
@@ -2,6 +2,9 @@
 \railalias{percent}{\%}
 \railalias{ppercent}{\%\%}
 \railalias{underscore}{\_}
+\railalias{lbrace}{\{}
+\railalias{rbrace}{\}}
+\railalias{atsign}{{\at}}
 
 \setlength\railextra{3.6ex}
 \setlength\railboxleft{0.9ex}