docs: fix typos in errorhandling.rst and views.rst

docs/errorhandling.rst

@@ -11,7 +11,7 @@ errors:
     reading from the incoming data
 -   the database server was overloaded and could not handle the query
 -   a filesystem is full
--   a harddrive crashed
+-   a hard drive crashed
 -   a backend server overloaded
 -   a programming error in a library you are using
 -   network connection of the server to another system failed
@@ -280,7 +280,7 @@ username and we can't find it, we raise a "404 Not Found".
     # a successful request would be like /profile?username=jack
     @app.route("/profile")
     def user_profile():
-        username = request.arg.get("username")
+        username = request.args.get("username")
         # if a username isn't supplied in the request, return a 400 bad request
         if username is None:
             abort(400)
@@ -494,7 +494,7 @@ This is a simple example:
     # a correct request might be /api/user?user_id=420
     @app.route("/api/user")
     def user_api(user_id):
-        user_id = request.arg.get("user_id")
+        user_id = request.args.get("user_id")
         if not user_id:
             raise InvalidAPIUsage("No user id provided!")
 

docs/views.rst

@@ -112,7 +112,7 @@ function.
             self.model = model
             self.template = f"{model.__name__.lower()}/detail.html"
 
-        def dispatch_request(self, id)
+        def dispatch_request(self, id):
             item = self.model.query.get_or_404(id)
             return render_template(self.template, item=item)