[bash_completion] Get rid of contain function

cranspasswords_bash_completion

 # Fonction de notre auto completion
 
-contain(){
-  local i
-  for i in $2; do
-      if [[ "$i" = "$1" ]]; then
-        return 0
-      fi
-  done
-  return 1
-}
-
-
 if [[ "$EDITOR" = "" ]]; then
     export EDITOR="nano";
 fi
@@ -18,7 +7,7 @@ fi
 _cranspasswords(){
   # declaration des variables locales
   local argc first last prev cur cur_first_char opts_short opts role_dir pass_dir server server_list role_list pass_list timeout
-  
+
   role_dir="/tmp/cranspasswords-$USER-role/"
   pass_dir="/tmp/cranspasswords-$USER-passwords/"
   # Combien de temps on garde les réponses du serveur en cache (en minutes)
@@ -46,7 +35,7 @@ _cranspasswords(){
   find "$pass_dir" -type f -mmin +$timeout -exec rm -f {} \;
 
   # On détermine si on utilsie un serveur alternatif
-  if contain "--server" "${COMP_WORDS[*]}"; then
+  if [[ "${COMP_WORDS[*]}" = *" --server "* ]]; then
     if [[ "$prev" = "--server" ]]; then
       _cranspasswords_server=$last;
     fi