readme: tabs -> spaces

README.org

@@ -42,12 +42,12 @@ key. You will need both your =client_id= and your =client_secret=. Then add to y
 two functions =bitwarden-api-client-id= and =bitwarden-api-client-secret= which have the same specification format as =bitwarden-automatic-unlock=.
 For example, here is the relevant section from my configuration.
 #+begin_src emacs-lisp
-  (setq bitwarden-api-secret-key
-	(plist-get (car (auth-source-search :host "bitwarden.key"))
-		   :secret))
-  (setq bitwarden-api-client-id
-	(plist-get (car (auth-source-search :host "bitwarden.id"))
-		   :secret))
+(setq bitwarden-api-secret-key
+      (plist-get (car (auth-source-search :host "bitwarden.key"))
+                 :secret))
+(setq bitwarden-api-client-id
+      (plist-get (car (auth-source-search :host "bitwarden.id"))
+                 :secret))
 #+end_src
 Note that these query two lines in my =authinfo.gpg= that have the form:
 #+BEGIN_QUOTE