diff --git a/grammar.ebnf b/grammar.ebnf
index 5ccb88d..1198841 100644
--- a/grammar.ebnf
+++ b/grammar.ebnf
@@ -17,13 +17,13 @@ binary_digit        ::= '0' | '1';
 
 character           ::= letter | digit | '_' ;
 
-identifier          ::= (letter | '_'), { character };
+identifier          ::= (letter | '_') { character };
 
-float               ::= digit  { digit }, '.', digit, {digit};
-dec_integer         ::= ['0D' | '0d'], digit, {digit};
-hex_integer         ::= ('0X'|'0x'), hexadecimal_digit, {hexadecimal_digit};
-octal_integer       ::= ('0O'|'0o'), octal_digit, {octal_digit};
-binary_integer      ::= ('0B'|'0b'), binary_digit, {binary_digit};
+float               ::= digit  { digit } '.' digit {digit};
+dec_integer         ::= ['0D' | '0d'] digit {digit};
+hex_integer         ::= ('0X'|'0x') hexadecimal_digit {hexadecimal_digit};
+octal_integer       ::= ('0O'|'0o') octal_digit {octal_digit};
+binary_integer      ::= ('0B'|'0b') binary_digit {binary_digit};
 integer             ::= dec_integer | hex_integer | octal_integer | binary_integer;
 number              ::= integer | float;