in core/src/com/jediterm/core/typeahead/TerminalTypeAheadManager.java [256:262]
private static boolean isPrintableUnicode(char c) {
int t = Character.getType(c);
return t != Character.UNASSIGNED && t != Character.LINE_SEPARATOR &&
t != Character.PARAGRAPH_SEPARATOR && t != Character.CONTROL &&
t != Character.FORMAT && t != Character.PRIVATE_USE &&
t != Character.SURROGATE;
}