feat(__load_completion): don't hush errors or output when sourcing files

We follow the message recent bash would output when sourcing a dir without letting bash to do it; doing so avoids fd leaks on some older but still supported bash versions. Other than that, let all output from sourcing the file pass through to ease debugging. Refs scop#506

Author: scop

bash_completion

@@ -2287,7 +2287,9 @@ __load_completion()
  for compfile in "$cmd" "$cmd.bash" "_$cmd"; do
  compfile="$dir/$compfile"
  # Avoid trying to source dirs; https://bugzilla.redhat.com/903540
- if [[ -f $compfile ]] && . "$compfile" &>/dev/null; then
+ if [[ -d $compfile ]]; then
+ echo "bash_completion: $compfile: is a directory" >&2
+ elif [[ -e $compfile ]] && . "$compfile"; then
  [[ $backslash ]] && $(complete -p "$cmd") "\\$cmd"
  return 0
  fi