Auto convert tabs to spaces in tree.txt

app/Console/Commands/GenerateTreeCommand.php

@@ -37,7 +37,7 @@ class GenerateTreeCommand extends Command
         while (!feof($file)) {
             $line = rtrim(fgets($file));
             if(trim($line) !== '') {
-                $lines[] = $line;
+                $lines[] = str_replace("\t", "    ", $line);
             }
         }