improved grammar

LogStatement:

	LOGKEYWORD LPAREN item+=LogItem (COMMA item+=LogItem)* RPAREN;

// TODO: LogItem is currently treated as template. Try to use FREE_TEXT again and change SimpleSpec somehow.

// This was seems to work and allows parsing constructs like: 

// log ( "*** f_1: INFO: OK - random value = " & bit2str(i1) & " ***" );

LogItem:

	text=FREE_TEXT | template=InLineTemplate;

	/*text=FREE_TEXT |*/ template=InLineTemplate;

Expression:

	SingleExpression | CompoundExpression;

terminal fragment CHAR:

	EXTENDED_ALPHA_NUM | LPAREN | RPAREN | LBRACKET | RBRACKET | SQUAREOPEN | SQUARECLOSE | ' ' | QUESTIONMARK | STAR |

	BACKSLASH | SLASH | MINUS | PLUS | SHARP | AT | COLON | STRINGOP | '=' | GREATERTHAN | LESSTHAN | PERCENT |

	DOLLAR | SINGLEQUOTE | '|';

	DOLLAR | SINGLEQUOTE | '|' | SEMICOLON;

terminal HSTRING returns ecore::EString:

	SINGLEQUOTE HEX* SINGLEQUOTE 'H';