Shellcheck action

.github/workflows/shellcheck.yml

@@ -0,0 +1,18 @@
+name: ShellCheck
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  shellcheck:
+    name: Shellcheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run ShellCheck
+        uses: ludeeus/action-shellcheck@master
+        with:
+            ignore_paths: ./completion.*

git-fixup

@@ -138,9 +138,13 @@ function fallback_menu() {
                         ;;
                     help|h)
                         local fmt="%s\n    %s\n"
+                        # shellcheck disable=SC2059
                         printf "$fmt" "<n>" "$op the <n>-th commit from the list" >&2
+                        # shellcheck disable=SC2059
                         printf "$fmt" "s[how] <n>" "show the <n>-th commit from the list" >&2
+                        # shellcheck disable=SC2059
                         printf "$fmt" "q[uit]" "abort operation" >&2
+                        # shellcheck disable=SC2059
                         printf "$fmt" "h[elp]" "show this help message" >&2
                         ;;
                 esac