Run command in function with explicit check for return code

This change fixes false negative if cmd passed on last retry.

retry

@@ -37,14 +37,17 @@ done
 retries="${retries:-3}"
 sleep="${sleep:-3}"
 
-ret=0
-until "$@"; do
+while true; do 
+    set +e
+    "$@"
     ret=$?
+    set -e
+    [ $ret -eq 0 ] && exit 0 
     [ "$retries" -gt 0 ] || break
     echo "Retrying up to $retries more times after sleeping ${sleep}s …" >&2
     retries=$((retries-1))
     sleep "$sleep"
     [ -n "$exponential" ] && sleep=$((sleep*exponential))
 done
 
-[ $retries -gt 0 ] || [ $ret -eq 0 ]
+[ $retries -gt 0 ]