Merge pull request #1539 from davidpfarrell/plugins/atomic/sudo

theme/atomic: Update sudo check method

themes/atomic/atomic.theme.bash

@@ -194,7 +194,7 @@ ___atomic_prompt_char() {
   color=$white
   prompt_char="${__ATOMIC_PROMPT_CHAR_PS1}"
   if [ "${THEME_SHOW_SUDO}" == "true" ]; then
-    if [ $(sudo -n id -u 2>&1 | grep 0) ]; then
+    if sudo -vn 1>/dev/null 2>&1; then
       prompt_char="${__ATOMIC_PROMPT_CHAR_PS1_SUDO}"
     fi
   fi