In the info page for "chmod invocation", node 27.2 Symbolic Modes, <quote>
The format of symbolic modes is:
[ugoa...][+-=]PERMS...[,...]
</quote>
the [+-=] is naturally read as "every character from + through =" due
to the special meaning of - in a character class. I suggest [+=-]
would be more apt. It is possible the same pattern is repeated
elsewhere in the manual.
Eddy.
