refactor(_expand): make exit status explicit

Author: akinomyoga

bash_completion

@@ -1751,10 +1751,11 @@ _expand()
             ;;
         ~*)
             _comp_compgen -v COMPREPLY tilde &&
-                eval "COMPREPLY[0]=$(printf ~%q "${COMPREPLY[0]#\~}")"
-            return ${#COMPREPLY[@]}
+                eval "COMPREPLY[0]=$(printf ~%q "${COMPREPLY[0]#\~}")" &&
+                return 1
             ;;
     esac
+    return 0
 }
 
 # Process ID related functions.