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

diff --git a/t/t7505-prepare-commit-msg-hook.sh b/t/t7505-prepare-commit-msg-hook.sh
index cd6c7c834218fd4c46c49396b79da1ddeef42772..ff189624d48fb9f68997395d121d4e7056511245 100755 (executable)
--- a/t/t7505-prepare-commit-msg-hook.sh
+++ b/t/t7505-prepare-commit-msg-hook.sh
@@ -32,7 +32,7 @@ echo "#!$SHELL_PATH" > "$HOOK"
 cat >> "$HOOK" <<'EOF'
 
 if test "$2" = commit; then
-  source=$(git-rev-parse "$3")
+  source=$(git rev-parse "$3")
 else
   source=${2-default}
 fi