Added conflict note (thefuck plugin)

plugins/thefuck/README.md

@@ -4,3 +4,6 @@
 
 ## Usage
 Press `ESC` twice to correct previous console command.
+
+## Notes
+`Esc`-`Esc` key binding conflicts with [sudo](https://github.com/robbyrussell/oh-my-zsh/tree/master/plugins/sudo) plugin.