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-rw-r--r--parser.l4
1 files changed, 2 insertions, 2 deletions
diff --git a/parser.l b/parser.l
index 2447e5fa..ca7c893d 100644
--- a/parser.l
+++ b/parser.l
@@ -187,13 +187,13 @@ TOK {SYM}
BT0 {BSCHR}({BSCHR}|{EXTRA})*
BT1 @{BT0}+
BT2 ({BSCHR}|{EXTRA})+
-BTREG (({BT0}|{BT1})?:{BT2}|({BT0}|{BT1})(:{BT2})?|:)
+BTREG ({BT0}|{BT1})?:{BT2}?|({BT0}|{BT1})(:{BT2})?
BTKEY @?:{BT2}?
BTOK {BTREG}|{BTKEY}
NT0 {NSCHR}({NSCHR}|{EXTRA})*
NT1 @{NT0}+
NT2 ({NSCHR}|{EXTRA})+
-NTREG (({NT0}|{NT1})?:{NT2}|({NT0}|{NT1})(:{NT2})?|:)
+NTREG ({NT0}|{NT1})?:{NT2}?|({NT0}|{NT1})(:{NT2})?
NTKEY @?:{NT2}?
NTOK {NTREG}|{NTKEY}
WS [\t ]*