fix

Author: toolgood

g4/math.g4

@@ -227,8 +227,8 @@ TRIM: 'TRIM';
 UPPER: 'TO'? 'UPPER';
 VALUE: 'VALUE';
 TIMEVALUE: 'TIMEVALUE';
-NORMSDIST: 'NORMSDIST' | 'NORM.S.DIST';
-NORMSINV: 'NORMSINV' | 'NORM.S.INV';
+NORMSDIST: 'NORM' ('S' | '.S.') 'DIST';
+NORMSINV: 'NORM' ('S' | '.S.') 'INV';
 FISHER: 'FISHER';
 FISHERINV: 'FISHERINV';
 GAMMALN: 'GAMMALN' '.PRECISE'?;
@@ -392,8 +392,8 @@ ADDDAYS: 'ADDDAYS';
 ADDHOURS: 'ADDHOURS';
 ADDMINUTES: 'ADDMINUTES';
 ADDSECONDS: 'ADDSECONDS';
-HAS: 'HAS' 'KEY'? | 'CONTAINS' 'KEY'?;
-HASVALUE: 'HASVALUE' | 'CONTAINSVALUE';
+HAS: ('HAS' | 'CONTAINS') 'KEY'?;
+HASVALUE: ('HAS' | 'CONTAINS') 'VALUE';
 INTERCEPT: 'INTERCEPT';
 SLOPE: 'SLOPE';
 CORREL: 'CORREL';