stringByAddingPercentEscapesUsingEncodingがエスケープする文字

2008-12-10 22:54:21.057 iview[9266:20b]
2008-12-10 22:54:21.058 iview[9266:20b] "
2008-12-10 22:54:21.059 iview[9266:20b] #
2008-12-10 22:54:21.059 iview[9266:20b] %
2008-12-10 22:54:21.060 iview[9266:20b] <
2008-12-10 22:54:21.060 iview[9266:20b] >
2008-12-10 22:54:21.061 iview[9266:20b] [
2008-12-10 22:54:21.062 iview[9266:20b] \
2008-12-10 22:54:21.063 iview[9266:20b] ]
2008-12-10 22:54:21.063 iview[9266:20b] ^
2008-12-10 22:54:21.063 iview[9266:20b] `
2008-12-10 22:54:21.064 iview[9266:20b] {
2008-12-10 22:54:21.064 iview[9266:20b] |
2008-12-10 22:54:21.065 iview[9266:20b] }

はじめのは0x20.
ほとんどの文字をエスケープしない。