[coreutils: tr] \55 \133 \135 taken as syntax tokens

[Stephane Chazelas]

(coreutils 5.2.1, on Debian Linux, C locale).

$ echo mmm | tr 'a\55z' a
aaa
(expected mmm)

$ echo abcd | tr 'abcd' '\133m*\135'
mmmm
(expected [m*])

If I understand
http://www.opengroup.org/onlinepubs/009695399/utilities/tr.html
correctly,

\55, \133, \135 should be treated as values to placed into the
arrays and shouldn't have the special meaning they have once
expanded.

regards,
Stéphane