04/13: doc: Fix the example of "Run `make` automatically"

[guix-commits]

civodul pushed a commit to branch master
in repository guix.

commit 969e86784bdba4737baf07d12c5c3117b7c56b48
Author: Rostislav Svoboda <rostislav.svoboda@gmail.com>
AuthorDate: Tue Jul 5 18:35:44 2022 +0200

    doc: Fix the example of "Run `make` automatically"
    
    * doc/contributing.texi (Running Guix Before It Is Installed): add missing
    command separator '--'.
    
    Signed-off-by: Ludovic Courtès <ludo@gnu.org>
---
 doc/contributing.texi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/contributing.texi b/doc/contributing.texi
index ad312ddeb6..02c7c5ae59 100644
--- a/doc/contributing.texi
+++ b/doc/contributing.texi
@@ -278,8 +278,8 @@ prepared Guile object (@file{.go}) files.
 
 You can run @command{make} automatically as you work using
 @command{watchexec} from the @code{watchexec} package.  For example,
-to build again each time you update a package file, you can run
-@samp{watchexec -w gnu/packages make -j4}.
+to build again each time you update a package file, run
+@samp{watchexec -w gnu/packages -- make -j4}.
 
 @node The Perfect Setup
 @section The Perfect Setup