Re: Document option tool-bar-mode

[Richard M. Stallman]

    >       You can turn display of tool bars on or off with @kbd{M-x
    >    -tool-bar-mode}.
    >    +tool-bar-mode} or by customizing the option @samp{tool-bar-mode}.
    > 
    > The two things above are described as equivalent, but they are not.
    > The first is strictly for the current session, the second is usually
    > meant to be permanent.

Not necessaily.  You can set variables either temporarily or permanently
with Custom.  So I think Bill's text is not wrong (aside from @samp).

We're talking to people here, not to machines.  If people won't get
the wrong idea, it isn't a problem.  Meanwhile, making the text longer
and more cumberson would impede clarity.  Let's use Bill's shorter
text.