Method getComma

ij/src/main/java/ij/macro/Interpreter.java:1358–1366

()

	}

	final void getComma() {
		getToken();
		if (token!=',') {
			if (looseSyntax)
				putTokenBack();
			else
				error("',' expected");
		}
	}

	void error(String message) {
		errorMessage = message;