Merge pull request pallets#483 from svieira/patch-1

Fix spelling.

Author: rduplain

flask/blueprints.py

@@ -25,7 +25,7 @@ def __init__(self, blueprint, app, options, first_registration):
         #: a reference to the current application
         self.app = app
 
-        #: a reference to the blurprint that created this setup state.
+        #: a reference to the blueprint that created this setup state.
         self.blueprint = blueprint
 
         #: a dictionary with all options that were passed to the