[PATCH 3/3] doc: interpret-trailers: fix example

[Kristoffer Haugsbakk <code@khaugsbakk.name>]

This command won’t output anything if you don’t give it an input and/or
a `--trailer`.

Cc: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
---
 Documentation/git-interpret-trailers.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/git-interpret-trailers.txt b/Documentation/git-interpret-trailers.txt
index 792d61ae7b..2aa190fd3f 100644
--- a/Documentation/git-interpret-trailers.txt
+++ b/Documentation/git-interpret-trailers.txt
@@ -326,7 +326,7 @@ $ git config trailer.sign.key "Signed-off-by: "
 $ git config trailer.sign.ifmissing add
 $ git config trailer.sign.ifexists doNothing
 $ git config trailer.sign.cmd 'echo "$(git config user.name) <$(git config user.email)>"'
-$ git interpret-trailers <<EOF
+$ git interpret-trailers --trailer sign <<EOF
 > EOF
 
 Signed-off-by: Bob <bob@example.com>
-- 
2.40.0