t4150-am: refactor am -3 tests

diff --git a/git-bisect.sh b/git-bisect.sh
index 2fc07acb0f242154fec868207cfd77f448929200..ae3fec22c48a296cdc1962def9030aa5bb7ce68a 100755 (executable)
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -127,7 +127,7 @@ bisect_start() {
                if test "z$mode" != "z--no-checkout"
                then
                        git checkout "$start_head" -- ||
-                       die "$(eval_gettext "Checking out '\$start_head' failed. Try 'git bisect reset <validbranch>'.")"
+                       die "$(eval_gettext "Checking out '\$start_head' failed. Try 'git bisect reset <valid-branch>'.")"
                fi
        else
                # Get rev from where we start.