checkout: implement "-" abbreviation, add docs and tests

diff --git a/t/t5303-pack-corruption-resilience.sh b/t/t5303-pack-corruption-resilience.sh
index ac181ea38a33eb4cd5f94414135813a80d646b79..d4e30fc43c68ed9b0fc175f2a88a07de6458f58e 100755 (executable)
--- a/t/t5303-pack-corruption-resilience.sh
+++ b/t/t5303-pack-corruption-resilience.sh
@@ -234,7 +234,7 @@ test_expect_success \
     'corruption #1 in delta base reference of first delta (OBJ_OFS_DELTA)' \
     'create_new_pack --delta-base-offset &&
      git prune-packed &&
-     printf "\x01" | do_corrupt_object $blob_2 2 &&
+     printf "\001" | do_corrupt_object $blob_2 2 &&
      git cat-file blob $blob_1 > /dev/null &&
      test_must_fail git cat-file blob $blob_2 > /dev/null &&
      test_must_fail git cat-file blob $blob_3 > /dev/null'