Treat DEL(\x7f) as a control character #113
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It seems that iTerm2 is able to invoke US-ASCII or DEC Special set into GL area.
Both of them are 94 character sets. So \x7f should be treated as a control character(DEL).
Now, the following code prints "abc de" on iTerm2.
But it will be "abcde" on most terminals(such as xterm, Terminal.app).
This patch improves the compatibility among iTerm2 and them.