-s ::= w* Grammar w* => "gram"
+s ::= ws grammar ws => "gram"
ws !::= w**
grammar ::= R+/ws => "grammar"
Grammar ::= R+ => "grammar"
Alternatives ::= EquiAlt +/ ">"
EquiAlt ::= Conjuncts +/ "|" => "alternatives"
-sequence ::= Es ^"/" E /ws
- > Es
-Es ::= E+
+sequence ::= Es
+ > Es ^"/" E /ws
+Es ::= E+
+//es ::= E+/ws
Conjuncts ::= rewrite
| rewrite ^"&" sequence