Add this snippet to your Sublime Text user keybindings settings to add the ability to wrap a selected word/phrase in backticks. Useful for revising the Learn App markdown files.

Default (OSX).sublime-keymap

  { "keys": ["`"], "command": "insert_snippet", "args": {"contents": "`${0:$SELECTION}`"}, "context":
    [
      { "key": "setting.auto_match_enabled", "operator": "equal", "operand": true },
      { "key": "selection_empty", "operator": "equal", "operand": false, "match_all": true }
    ]
  }