message: docs(back-button): fix typo
diff: @@ -215,7 +215,7 @@ It is recommended to check whether or not the user is on the root page prior to
  ## Internal Framework Handlers
  -Th table below lists all of the internal hardware back button event handlers that Ionic Framework uses. The `Propagates` column notes whether or not that particular handler tells Ionic Framework to call the next back button handler.
  +The table below lists all of the internal hardware back button event handlers that Ionic Framework uses. The `Propagates` column notes whether or not that particular handler tells Ionic Framework to call the next back button handler.
  | Handler | Priority | Propagates | Description |
  | -----------| ---------| -------------------| -----------------------------------------------------------------------------------------------------------------------------------------|
  