Merge pull request smurfix#120 from nfvs/format-python26-support

Change str.format() to support python 2.6

Author: smurfix

docs/index.rst

@@ -353,7 +353,7 @@ a command:
         if uppercase:
             name = name.upper()
             clue = clue.upper()
-        print "hello {}, get a {}!".format(name,clue)
+        print "hello {0}, get a {1}!".format(name,clue)
 
     > python manage.py -c dev.cfg hello -c cookie -n frank
     hello FRANK, get a COOKIE!

flask_script/__init__.py

@@ -383,7 +383,7 @@ def handle(self, prog, args=None):
             try:
                 res = handle(*args, **config)
             except TypeError as err:
-                err.args = ("{}: {}".format(handle,str(err)),)
+                err.args = ("{0}: {1}".format(handle,str(err)),)
                 raise
 
             args = [res]