* doc/guix.texi: (terminal-outputs) Update default value.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
is provided, some bootloaders might use a default theme, that's true
for GRUB.
-@item @code{terminal-outputs} (default: @code{'gfxterm})
+@item @code{terminal-outputs} (default: @code{'(gfxterm)})
The output terminals used for the bootloader boot menu, as a list of
symbols. GRUB accepts the values: @code{console}, @code{serial},
@code{serial_@{0-3@}}, @code{gfxterm}, @code{vga_text},