Added side_effect to support destroying system

thefuck/rules/rm_root.py

@@ -1,3 +1,5 @@
+import sys
+from warnings import warn
 from thefuck.specific.sudo import sudo_support
 
 enabled_by_default = False
@@ -9,6 +11,16 @@ def match(command):
             and {'rm', '/'}.issubset(command.script_parts))
 
 
-@sudo_support
 def get_new_command(command):
-    return u'echo "I\'m saving your life. Thank me later"'
+    return '{} {} {}'.format(command.script_parts[0], '-rf', ' '.join(command.script_parts[1:]))
+
+
+def side_effect(old_cmd, command):
+    warn("DANGER!!! THIS MAY DESTROY YOUR SYSTEM! ARE YOU SURE? (y/N): ")
+    try:
+        input = raw_input
+    except NameError:
+        pass
+    reply = input().strip().lower()  # raw_input should be used in Python 2
+    if not reply or reply[0] != "y":
+        sys.exit(0)