[1.3.X] Fixed small typos in custom template tags docs.

Shortcut for simple tags

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Many template tags take a number of arguments -- strings or a template variables

Many template tags take a number of arguments -- strings or template variables

-- and return a string after doing some processing based solely on

the input argument and some external information. For example, the

the input arguments and some external information. For example, the

``current_time`` tag we wrote above is of this variety: we give it a format

string, it returns the time as a string.

To ease the creation of the types of tags, Django provides a helper function,

To ease the creation of these types of tags, Django provides a helper function,

``simple_tag``. This function, which is a method of

``django.template.Library``, takes a function that accepts any number of

arguments, wraps it in a ``render`` function and the other necessary bits