Only consider raw command in output match

... else it will not work for localized messages.

Example German output:
```
Führen Sie »apt list --upgradable« aus, um sie anzuzeigen.
```

thefuck/rules/apt_list_upgradable.py

@@ -8,7 +8,7 @@ enabled_by_default = apt_available
 @sudo_support
 @for_app('apt')
 def match(command):
-    return "Run 'apt list --upgradable' to see them." in command.output
+    return 'apt list --upgradable' in command.output
 
 
 @sudo_support