bug#2016: 23.0.60; rmail-toggle-header not limited to current message

[Glenn Morris]

Chong Yidong wrote (on Wed, 28 Jan 2009 at 10:55 -0500):

> > Typing `t' in an Rmail buffer causes all the messages to be displayed
> > with their full headers.  Before the mbox merge, the effect of `t' was
> > limited to the single message that was displayed at the time `t' was
> > pressed, and typing `n' or `'p' to go to a different message would
> > undo `t'.
> 
> Fixed, thanks.

Now it doesn't toggle. The first `t' expands the headers, a second `t'
does nothing.