change input override condition for shellcheck compliance

Author: DannyBen

lib/bashly/views/command/start.gtx

@@ -1,7 +1,7 @@
 = view_marker
 
 > {{ Settings.function_name :initialize }} "$@"
-> if declare -p input_override &>/dev/null; then
+> if [[ -v input_override ]]; then
 >   {{ Settings.function_name :run }} "${input_override[@]}"
 > else
 >   {{ Settings.function_name :run }} "$@"