bin: failure containment for st and git-ln

.local/bin/scripts/git-ln

@@ -2,4 +2,4 @@
 set -o pipefail
 upCount=$(git rev-list --count HEAD...@{push} 2>/dev/null)
 count=$(expr ${upCount:-0} + 3 \& ${upCount:-0} \> 3 \| 6)
-git --no-pager lo -$count --color=always --graph HEAD @{push} | head -9 || git --no-pager lo -7
+git --no-pager lo -$count --color=always --graph HEAD @{upstream} | head -9 || git --no-pager lo -7

.local/bin/scripts/st

@@ -1,5 +1,6 @@
 #!/bin/sh
 # Query local syncthing REST API
+test $# -eq 0 && echo "Usage: st <command> [args...]" && exit 1
 subscript="$(which "$(basename $0)-$1" 2>/dev/null)"
 if test -f "$subscript"
 then shift && $subscript "$@"