Fix arguments in shfmt.sh, remove hardcoded paths

maintenance/shfmt.sh

@@ -1,16 +1,11 @@
 #!/usr/bin/env bash
-set -Eeuo pipefail
 
 shfmt_args=(
-    --indent 4
-    --keep-padding      # keep column alignment paddings
-    --space-redirects   # redirect operators will be followed by a space
-    --binary-next-line  # binary ops like && and | may start a line
-    --case-indent       # switch cases will be indented
+    -i=4
+    -kp      # keep column alignment paddings
+    -sr   # redirect operators will be followed by a space
+    -bn  # binary ops like && and | may start a line
+    -ci       # switch cases will be indented
 )
 
-shfmt "${shfmt_args[@]}" "$@" \
-    helpers/helpers \
-    helpers/helpers.v2.1.d/* \
-    helpers/helpers.v2.d/* \
-    hooks/*
+shfmt "${shfmt_args[@]}" "$@"