[PATCH 4/4] docs: Add missing assumption

[Glenn Washburn]

Also reword a prior sentence to be more clear.

Fixes: 5a3d2b4742df (docs: Add debugging chapter to development documentation)
Signed-off-by: Glenn Washburn <development@efficientek.com>
---
 docs/grub-dev.texi | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/docs/grub-dev.texi b/docs/grub-dev.texi
index 72470b42c61a..a26171237d6a 100644
--- a/docs/grub-dev.texi
+++ b/docs/grub-dev.texi
@@ -660,10 +660,11 @@ GDB is started from the @file{grub-core} directory in the 
GRUB2 build
 directory. GRUB2 developers have made this more simple by including a GDB
 script which does much of the setup. This file at @file{grub-core/gdb_grub}
 of the build directory and is also installed via @command{make install}.
-If not building GRUB, the distribution may have a package which installs
+When using a pre-built GRUB, the distribution may have a package which installs
 this GDB script along with debug symbol binaries, such as Debian's
 @samp{grub-pc-dbg} package. The GDB scripts is intended to by used
-like so, assuming:
+like so, assuming that @samp{/path/to/script} is the path to the directory
+containing the gdb_grub script and debug symbol files:
 
 @example
 cd $(dirname /path/to/script/gdb_grub)
-- 
2.34.1