[PATCH] edit documentation for TUI mode

[Bob Wilson]

Eli Zaretskii wrote:
> The last sentence begs a question: ``how''?  We should either answer
> that right there, or have an xref to where the appropriate command is
> described.

Good point.  I'm not entirely sure what to do here.  It would be best to specify 
it directly, with a cross-ref for additional info, but there appear to be a lot 
of different ways of switching into TUI mode.  Even the "C-x C-a" key binding, 
which is the most straightforward and also works to switch back out of TUI mode, 
has 3 different variations: "C-x C-a", "C-x a" and "C-x A".

What do you think about changing that sentence as follows?

You can also switch in and out of TUI mode while @value{GDBN} runs by using 
various TUI commands and key bindings, such as @kbd{C-x C-a}.  @xref{TUI Keys, ,
TUI Key Bindings}.


> Why did you switch to `@table @asis' and an explicit @key in each
> item?  What was wrong with the previous method?

The last entry, "C-L", is not a key.  It needs to be formatted with @kbd.  The 
difference doesn't matter much for Info output, but for TeX output, it is bad to 
have a key-shaped box with "C-L" inside it.

--Bob