Fix README

Also I made a typo in the previous commit, it's supposed to be rationale
not rational

README.md

@@ -26,5 +26,5 @@ It also has formatting, autocomplete, and the Gruvbox theme.
 **Special actions:**  
 To activate the formatter, do `:Fmt`  
 To open the file explorer window, do `:Exp`  
-To enter the selected autocomplete selection, press `Tab`
+To enter the selected autocomplete selection, press `Tab`  
 To see information on the word at the cursor, press `Shift-K`. You can also hover over it with your cursor.