grep: rip out pessimization to use fixmatch()

diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
index 04e4b7c5c2aa4f7c6922ebc5c9236962ab5d175c..0144d9e858d2d8bf1720331c52f1809ed36e81b0 100755 (executable)
--- a/t/t6010-merge-base.sh
+++ b/t/t6010-merge-base.sh
@@ -110,6 +110,18 @@ test_expect_success 'compute merge-base (all)' \
 
 # Another set to demonstrate base between one commit and a merge
 # in the documentation.
+#
+# * C (MMC) * B (MMB) * A  (MMA)
+# * o       * o       * o
+# * o       * o       * o
+# * o       * o       * o
+# * o       | _______/
+# |         |/
+# |         * 1 (MM1)
+# | _______/
+# |/
+# * root (MMR)
+
 
 test_expect_success 'merge-base for octopus-step (setup)' '
        test_tick && git commit --allow-empty -m root && git tag MMR &&
@@ -137,6 +149,12 @@ test_expect_success 'merge-base A B C' '
        test "$MM1" = "$MB"
 '
 
+test_expect_success 'merge-base A B C using show-branch' '
+       MB=$(git show-branch --merge-base MMA MMB MMC) &&
+       MMR=$(git rev-parse --verify MMR) &&
+       test "$MMR" = "$MB"
+'
+
 test_expect_success 'criss-cross merge-base for octopus-step (setup)' '
        git reset --hard MMR &&
        test_tick && git commit --allow-empty -m 1 && git tag CC1 &&