Use shell instead of ls.

Author: havenwood

share/chruby/chruby.sh

@@ -5,8 +5,8 @@ function chruby_rubies()
 	sortable=()
 
 	for dir in "$@"; do
-		[[ -d "$dir" && -n $(ls -A "$dir") ]] && for ruby in "$dir"/*; do
-			ruby_basename="${ruby##*/}" && sortable+=("${ruby_basename/-/.}\t$ruby")
+		[[ -d "$dir" ]] && for ruby in "$dir"/*; do
+			[[ -d "$ruby" ]] && ruby_basename="${ruby##*/}" && sortable+=("${ruby_basename/-/.}\t$ruby")
 		done
 	done